Fix for getting listObjects from filtered list with nil predicate
Merge pull request #2 from Raizlabs/FilteredObjectFix

Fix for getting listObjects from filtered list with nil predicate
Initial commit of RZObserverCollection
Proper associated object keying, removal of begin/end observer methods on tableview data source
Comment Refactoring
Fixed project name in headers
Add RZObserverCollection to Demo Project. Fix header search path.
Merge pull request #4 from Raizlabs/WeakObserverReferences

Weak observer references
FilteredList Fixes for CollectionViewDataSource.
Remove data sources as list observers when deallocating
Fix edge case where source section object is not found in source sections.
Fix conflict in pbxproj

Restore HEADER_SEARCH_PATHS to "../**"
Merge upstream changes