#4 Add support for *.PNG, JPEG loading

[David]

Hi,

nowadays Allegro ships with two addon libraries, libloadpng and libjpgalleg for loading png and jpeg images into allegro bitmaps. This patch makes AlPy support these image format:

http://projects.qi-hardware.com/index.php/p/openwrt-packages/source/file/master/alpy/patches/030-png-jpeg-addons.patch

It doesn't change the linker command line, though (-ljpgalleg -lloadpng -lpng -lz), which is just done via setting LDFLAGS in our package recipe.

cheers,

David