Started guide/snap menu refactoring
New Menu Structure Extras/Snap
Behaviour is inline with Photoshop experience
Simplified some of the previous guide updating code, removed inaction.
Grid Spacing Save
Fix Grid Save

Reset Extras on Close
Merge pull request #520 from cocojoe/develop

New Extras/Show Menu
Test target added to SpriteBuilder.
First test added to compare written and read CCB versions.
Merge pull request #522 from NickyWeber/feature/test_target_added_to_sb

Test target added to SpriteBuilder.
Guide Fix
Grid Tweaks
Ruler Fix
Merge pull request #525 from jtwigg/develop

Add Reset preffered size button to CCButton inspector.
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.
flip pvr images.
fix rendered screen (again).