do not screw up line endings when reading files

Now we don't add an extra \r for no reason when reading in user
templates or problem files with DOS line endings.

Fixes #21. Thanks @sen-7!

Author: chazmcgarvey

src/com/dogcows/Util.java

@@ -98,7 +98,7 @@ public static String readFile(File file) throws IOException
             reader.close();
         }
 
-        return text.toString().replaceAll("\n", System.getProperty("line.separator"));
+        return text.toString();
     }
 
     /**