I'm guessing this takes care of
issue #689
update the touch interface to the new SDL2 API
touch is a little flacky, works great on buttons and wigets but crosshair and hogs are difficult to select...
strip out our copy of libfreetype
SDL2_ttf comes with a more updated, better integrated version
strip out our copy of libtremor
SDL2_mixer comes with a more updated, better integrated version
Merge pull request #1 from urbels/patch-1
fixed urls and added new version links for android deps