Merge pull request #53 from kausters/master

Support all of the geometry strings

lib/retina_rails/strategies/paperclip.rb

@@ -84,15 +84,8 @@ def optimize_retina!(name)
 
               ## Iterate over styles and set optimzed dimensions
               styles.each_pair do |key, value|
-
                 dimensions = value.kind_of?(Array) ? value[0] : value
-
-                width  = dimensions.scan(/\d+/)[0].to_i * 2
-                height = dimensions.scan(/\d+/)[1].to_i * 2
-
-                processor = dimensions.scan(/#|</).first
-
-                new_dimensions = "#{width}x#{height}#{processor}"
+                new_dimensions = dimensions.gsub(/\d+/) { |dimension| dimension.to_i * 2}
                 retina_styles[key.to_sym] = value.kind_of?(Array) ? [new_dimensions, value[1]] : new_dimensions
 
                 ## Set quality convert option