scrolling and terrain generation

i know it's not pretty right now, but i think this is a good
proof-of-concept. this is just a prototype after all
Merge branch 'master' of https://github.com/AlexWillisson/runner

Conflicts:
	Platformer/src/PlayState.as
resolved merge conflict
fixed lag
added unpause instructions
Added death conditions for hitting the sides of the screen. Still untested as of now
Merge branch 'master' into weddemo
sped up and moved leg further away
removed map2
generation working, camera working, animations not lined up well