Add some apidoc for rubella.rb

lib/rubella.rb

@@ -46,14 +46,29 @@ module Rubella
 
     end
 
+    # Creates a heatmap in the on construction given format. The data must be
+    # in the also on construction given formate.
+    #
+    # @param data string The data, which should be used
+    # @return binaryblob An output representation of the heatmap
     def create_from_string data
       process @input.string data
     end
 
+    # Creates a heatmap in the on construction given format. The data must be
+    # in the also on construction given formate.
+    #
+    # @param file_name string  
+    # @return binaryblob An output representation of the heatmap
     def create_from_file file_name
       process @input.file file_name
     end
 
+    # Processes the creation of the heatmap, after the construction of the input
+    # object. So the input object is given here as parameter.
+    #
+    # @param inpt Input The inputed data
+    # @return binaryblob An output representation of the heatmap
     def process inpt
       weight = @weighting.new 10
       outpt    = @output.new