Revert navtree bug.
Fix a variety of strict compiler warnings.
[attributedlabel] Add C preprocessor statements for C++ compat.
[core] Add NIImageUtilities.
[core] Add NIButtonUtilities.
[core] Fix typo in the docs.
[core] Fix more typos.
[core] Add NIEdgeInsetsOutsetRect.
[core] Add NIIsPhone.
[core] Flip order of parameters in NIEdgeInsetsOutsetRect.
[core] Add NICenter methods for centering views.
[core] Add NIIsLandscapePhoneOrientation.
	new file:   src/models/src/NIManagedCellObject.h
	new file:   src/models/src/NIManagedCellObject.m