Add Bitdeli badge
Use `performBlockAndWait:` to avoid duplicates when adding to the cache. refs #1079
Fix crash in tests due to fetch request cache changes
Fix intermittent test failures/crashes
Improve performance of cache key calculations by using fast enumeration and avoiding `[NSString stringWithFormat:]`
Fix exceptions in OS X test suite
Remove unnecessary logging from test
Finish the operation immediately upon start if cancelled before being started
Eliminate use of stringWithFormat: when calculating fetch request cache keys
Add license boilerplate to RKFetchRequestManagedObjectCache.m
Fix crash due to invalid C string handling in fetch request cache key computation