Split match by underscore to get whole resolution, instead transform …

…to integer

lib/wraith/gallery.rb

@@ -49,7 +49,7 @@ def match(categories, dirname)
   end
 
   def matcher(match, filename, dirname, category)
-    @size = match[1].to_i
+    @size = match[1].split('_')[0]
     @group = match[2]
     @filepath = category + "/" + filename
     @thumbnail = "thumbnails/#{category}/#{filename}"