added setChromeTitle for subclassing

setChromeTitle allows individual titles in a subclass
added setChromeTitle for subclassing

override setChromeTitle in a subclass for individual titles
Merge remote-tracking branch 'upstream/master'
Changed Object type --> causes compiler fault
Fixed activeRequest-queue - adding of the identifier key was missing
b2
Fixed issue when setting cache size of thumbnail and high quality image caches.
[core] Add NIRectExpand.
[core] Add NISizeOfStringWithLabelProperties.
[attributedlabel] Fix CF delegate leak in image run generation.
[core] Added transparency support for snapshots.
Using NI_WEAK

Use NI_WEAK macro to use either weak, assign, or __unsafe_unretained.
[attributedlabel] Don't remove images when the run delegate deallocates.

This caused periodic crashes that were revealed by avoiding the memory leak fixed in 3b46abf455389e55384663b526a0567e13e27460.
[docs] Ignore __NI_DEPRECATED_METHOD in docs generation.
[docs] Misc. updates to docs stylesheet.
[models] Improvements to NITableViewActions interface.

This change introduces new features to the NITableViewActions interface.

- Attaching selectors to objects and classes.
- Actions are now initialized with an id target rather than a UIViewController, allowing for more versatile action implementations.
- More documentation.
- Blocks are now at the end of the method argument list in keeping with Apple's recommended style guidelines for blocks.
Misc. doxygen warnings.
[models] Avoid potential crash caused by storing nil value in dictionary.

NICellFactory's cellClassFromObject: method could potentially attempt to
store nil into the objectToCellMap if the passed object was nil. This
could happen when the model was nil in a call to heightForRowAtIndexPath:.
[core] Add NI_IGNORE_DEPRECATIONS flag for ignoring deprecation warnings.
[core] Remove ability to disable deprecation notices.