diff --git a/app/models/topic.rb b/app/models/topic.rb
index b4218202..0af94656 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -1,159 +1,159 @@
-class Topic < ActiveRecord::Base
-  include TopicsHelper
-
-  belongs_to :user
-
-  has_many :synapses1, :class_name => 'Synapse', :foreign_key => 'node1_id'
-  has_many :synapses2, :class_name => 'Synapse', :foreign_key => 'node2_id'
-  has_many :topics1, :through => :synapses2, :source => :topic1
-  has_many :topics2, :through => :synapses1, :source => :topic2
-
-  has_many :mappings
-  has_many :maps, :through => :mappings
-    
-  # This method associates the attribute ":image" with a file attachment
-  has_attached_file :image
-    
-  #, styles: {
-  # thumb: '100x100>',
-  # square: '200x200#',
-  # medium: '300x300>'
-  #}
-
-  # Validate the attached image is image/jpg, image/png, etc
-  validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/
-  
-  # This method associates the attribute ":image" with a file attachment
-  has_attached_file :audio
-  # Validate the attached audio is audio/wav, audio/mp3, etc
-  validates_attachment_content_type :audio, :content_type => /\Aaudio\/.*\Z/   
-    
-  def synapses
-     synapses1 + synapses2
-  end
-  
-  def relatives
-     topics1 + topics2
-  end
-
-  belongs_to :metacode
-
-  def user_name
-    self.user.name
-  end
-
-  def user_image
-    self.user.image.url
-  end
-
-  def map_count
-    self.maps.count
-  end
-
-  def synapse_count
-    self.synapses.count
-  end
-
-  def inmaps
-    self.maps.map(&:name)
-  end
-
-  def inmapsLinks
-    self.maps.map(&:id)
-  end
-
-  def as_json(options={})
-    super(:methods =>[:user_name, :user_image, :map_count, :synapse_count, :inmaps, :inmapsLinks])
-  end
-
-  def topic_autocomplete_method
-    "Get: #{self.name}"
-  end
-  
-  def mk_permission
-    if self.permission == "commons"
-      "co"
-    elsif self.permission == "public"
-      "pu"
-    elsif self.permission == "private"
-      "pr"
-    end
-  end
-
-  # has no viewable synapses helper function
-  def has_viewable_synapses(current)
-  	result = false
-  	self.synapses.each do |synapse|
-  		if synapse.authorize_to_view(current)
-  			result = true
-  		end
-  	end
-  	return result
-  end
-
-  def synapses_csv(output_format = "array")
-    output = []
-    self.synapses.each do |synapse|
-      if synapse.category == "from-to"
-        if synapse.node1_id == self.id
-          output << synapse.node1_id.to_s + "->" + synapse.node2_id.to_s
-        elsif synapse.node2_id == self.id
-          output << synapse.node2_id.to_s + "<-" + synapse.node1_id.to_s
-        else
-          abort("invalid synapse on topic in synapse_csv")
-        end
-      elsif synapse.category == "both"
-        if synapse.node1_id == self.id
-          output << synapse.node1_id.to_s + "<->" + synapse.node2_id.to_s
-        elsif synapse.node2_id == self.id
-          output << synapse.node2_id.to_s + "<->" + synapse.node1_id.to_s
-        else
-          abort("invalid synapse on topic in synapse_csv")
-        end
-      end
-    end
-    if output_format == "array"
-      return output
-    elsif output_format == "text"
-      return output.join("; ")
-    else
-      abort("invalid argument to synapses_csv")
-    end
-    return output
-  end
-  
-  ##### PERMISSIONS ######
-  
-  # returns false if user not allowed to 'show' Topic, Synapse, or Map
-  def authorize_to_show(user)  
-	if (self.permission == "private" && self.user != user)
-		return false
-	end
-	return self
-  end
-  
-  # returns false if user not allowed to 'edit' Topic, Synapse, or Map
-  def authorize_to_edit(user)  
-	if (self.permission == "private" && self.user != user)
-		return false
-	elsif (self.permission == "public" && self.user != user)
-		return false
-	end
-	return self
-  end
-
-  def authorize_to_delete(user)  
-    if (self.user != user)
-      return false
-    end
-    return self
-  end
-  
-  # returns Boolean if user allowed to view Topic, Synapse, or Map
-  def authorize_to_view(user)  
-	if (self.permission == "private" && self.user != user)
-		return false
-	end
-	return true
-  end
-end
+class Topic < ActiveRecord::Base
+  include TopicsHelper
+
+  belongs_to :user
+
+  has_many :synapses1, :class_name => 'Synapse', :foreign_key => 'node1_id'
+  has_many :synapses2, :class_name => 'Synapse', :foreign_key => 'node2_id'
+  has_many :topics1, :through => :synapses2, :source => :topic1
+  has_many :topics2, :through => :synapses1, :source => :topic2
+
+  has_many :mappings
+  has_many :maps, :through => :mappings
+    
+  # This method associates the attribute ":image" with a file attachment
+  has_attached_file :image
+    
+  #, styles: {
+  # thumb: '100x100>',
+  # square: '200x200#',
+  # medium: '300x300>'
+  #}
+
+  # Validate the attached image is image/jpg, image/png, etc
+  validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/
+  
+  # This method associates the attribute ":image" with a file attachment
+  has_attached_file :audio
+  # Validate the attached audio is audio/wav, audio/mp3, etc
+  validates_attachment_content_type :audio, :content_type => /\Aaudio\/.*\Z/   
+    
+  def synapses
+     synapses1 + synapses2
+  end
+  
+  def relatives
+     topics1 + topics2
+  end
+
+  belongs_to :metacode
+
+  def user_name
+    self.user.name
+  end
+
+  def user_image
+    self.user.image.url
+  end
+
+  def map_count
+    self.maps.count
+  end
+
+  def synapse_count
+    self.synapses.count
+  end
+
+  def inmaps
+    self.maps.map(&:name)
+  end
+
+  def inmapsLinks
+    self.maps.map(&:id)
+  end
+
+  def as_json(options={})
+    super(:methods =>[:user_name, :user_image, :map_count, :synapse_count, :inmaps, :inmapsLinks])
+  end
+
+  def topic_autocomplete_method
+    "Get: #{self.name}"
+  end
+  
+  def mk_permission
+    if self.permission == "commons"
+      "co"
+    elsif self.permission == "public"
+      "pu"
+    elsif self.permission == "private"
+      "pr"
+    end
+  end
+
+  # has no viewable synapses helper function
+  def has_viewable_synapses(current)
+  	result = false
+  	self.synapses.each do |synapse|
+  		if synapse.authorize_to_view(current)
+  			result = true
+  		end
+  	end
+  	return result
+  end
+
+  def synapses_csv(output_format = "array")
+    output = []
+    self.synapses.each do |synapse|
+      if synapse.category == "from-to"
+        if synapse.node1_id == self.id
+          output << synapse.node1_id.to_s + "->" + synapse.node2_id.to_s
+        elsif synapse.node2_id == self.id
+          output << synapse.node2_id.to_s + "<-" + synapse.node1_id.to_s
+        else
+          abort("invalid synapse on topic in synapse_csv")
+        end
+      elsif synapse.category == "both"
+        if synapse.node1_id == self.id
+          output << synapse.node1_id.to_s + "<->" + synapse.node2_id.to_s
+        elsif synapse.node2_id == self.id
+          output << synapse.node2_id.to_s + "<->" + synapse.node1_id.to_s
+        else
+          abort("invalid synapse on topic in synapse_csv")
+        end
+      end
+    end
+    if output_format == "array"
+      return output
+    elsif output_format == "text"
+      return output.join("; ")
+    else
+      abort("invalid argument to synapses_csv")
+    end
+    return output
+  end
+  
+  ##### PERMISSIONS ######
+  
+  # returns false if user not allowed to 'show' Topic, Synapse, or Map
+  def authorize_to_show(user)  
+	if (self.permission == "private" && self.user != user)
+		return false
+	end
+	return self
+  end
+  
+  # returns false if user not allowed to 'edit' Topic, Synapse, or Map
+  def authorize_to_edit(user)  
+	if (self.permission == "private" && self.user != user)
+		return false
+	elsif (self.permission == "public" && self.user != user)
+		return false
+	end
+	return self
+  end
+
+  def authorize_to_delete(user)  
+    if (self.user != user)
+      return false
+    end
+    return self
+  end
+  
+  # returns Boolean if user allowed to view Topic, Synapse, or Map
+  def authorize_to_view(user)  
+	if (self.permission == "private" && self.user != user)
+		return false
+	end
+	return true
+  end
+end