allow customization of kivy branch
Merge branch 'master' of ssh://github.com/kivy/kivy-ios
add ffmpeg builds script
Updated python url
Merge pull request #83 from BoonsNaibot/patch-1

Updated python url
ffmpeg: fix root directory
python: fix new url download + ensure we are following any redirection in the future. closes #85
Merging with the kivy/master branch

 Changes to be committed:
	new file:   tools/build-ffmpeg.sh
	modified:   tools/build-kivy.sh
	modified:   tools/build-python.sh