Adding scripts to build PIL for kivy-ios
	new file:   pil_files/patch_pil.patch
	new file:   ../tools/build-libjpeg.sh
	new file:   ../tools/build-pil.sh
Fixing some problems in the libjpeg building process
	new file:   ../../src/jpeg_files/jpeg_makefile.patch
	modified:   ../../tools/build-libjpeg.sh
	modified:   src/jpeg_files/jpeg_makefile.patch
	modified:   src/pil_files/patch_pil.patch
	modified:   tools/build-libjpeg.sh
Modifying the main build script in order to include the jpeg and pil building processes

	modified:   build-all.sh
Merge pull request #53 from tonibagur/master

Adding PIL support(with jpeg+png) to kivy-ios