Guide Fix
Grid Tweaks
Ruler Fix
CCPhysicsNode default 100% container, fixes snap issues due to 0,0 dimensions
Auto enable snap grid upon extra grid on (more natural)
Fixes for edge snapping.
Merge pull request #531 from cocojoe/develop

Guides Fix / Physics Container Defaults Fix
Merge pull request #530 from slembcke/edge-snapping

Fixes for edge snapping.
More node snapping fixes.
flip pvr images.
fix rendered screen (again).
Merge pull request #533 from jtwigg/develop

Fix PVR's. Adjust renderScene (again).
Merge pull request #532 from slembcke/edge-snapping

More node snapping fixes.