Removed the DevIL backend from love.image. Replaced it with PNG and JPEG encoders/decoders via LodePNG, zlib, and libjpeg-turbo.

PNG and JPEG are now the only two supported image formats, aside from compressed DDS (DXT, etc.)

--HG--
branch : minor

src/modules/image/magpie/FormatHandler.h

@@ -93,6 +93,11 @@ public:
 	 **/
 	virtual EncodedImage encode(const DecodedImage &img, ImageData::Format format);
 
+	/**
+	 * Frees memory allocated by the format handler.
+	 **/
+	virtual void free(unsigned char *mem);
+
 }; // FormatHandler
 
 } // magpie