Added walljumping & better slide

You can now save yourself with up to 3 walljumps. You no longer get stuck
on things sideways (by switchin from Transform.translate() to
rigidbody.moveTo(position), which makes it do some level of collision
detection)

When you hit a wall, you bounce off a bit to the left. You can then do a
"double" jump, which makes you move right again. You can repeat this up to
3 times, so you "get" 3 wall-jumps. Helps a lot to save yourself.
Merge branch 'master' into L1DEV

Conflicts:
	Library/assetDatabase3
	Library/metadata/25/2569d3d0a8ca99c4292089419043ab7d
Fixed force-back, forgot it used editor value not code
Didn't save whole project before commit, d'oh