Merge pull request #9 from Kotzi/master

Second level added
Corrected character position in level 2
Configurable baseHeight
Base reset
Merge remote-tracking branch 'kotzi/master'

Conflicts:
	data/level2.tmx
Merge remote-tracking branch 'kotzi/master'
Merge pull request #12 from Kotzi/master

New levels and other changes
Merge pull request #14 from Kotzi/master

Little fix for first level
Merge pull request #16 from Kotzi/master

Background optimization
Poison tool
Melting ice raises the water level
Generic Killable mixin
Basic enemy
Changed audio channels to avoid multiple loads
Disable audio on debug
Water doesn't raise with meltTool if all ice has melted
Enemies drown
Years left on HUD
Added water level to the hud
Tween on tool pickup