Assert messages improved.
Added some special case error hint messages to help locate the cause for an assert.
Merge pull request #747 from NickyWeber/feature/sb#360_improved_assert_messages_in_ccbreader

Assert messages improved.
Ordering of nodes in a CCLayout depends on children's z-order which is now correct after adding a node.
Fixes the SpriteBuilder bug #465.
Merge pull request #753 from NickyWeber/bugfix/sb#465_cclayoutbox_spritebuilder

Ordering of nodes in a CCLayout depends on children's z-order which is n...
Fixes for CC_SPRITE_DEBUG_DRAW.
Adding resolution based tilemap test.
Merge branch 'v3.0' into develop

Conflicts:
	cocos2d-ui/CCBReader/CCBReader.m
	cocos2d/CCSprite.m
	cocos2d/CCSprite9Slice.m
Retina tileset fixes.
Minor cleanup and fixes.
Undoing the CCRenderTexture anchor point changes.
Merge branch 'develop' of github:cocos2d/cocos2d-iphone into develop
Merge branch 'develop' of github:cocos2d/cocos2d-iphone into develop