Removed multiple declarations of method

method had two identical declarations: 'mappableObjectForData:'
Removed multiple declarations of method

Method 'requestAllSortedBy:ascending:withPredicate:inContext' was declared identically twice!
Removed multiple declarations of method

Method 'objectLoaderForObject:method:delegate:' was declared identically three times!
Bump deployment target to 5.0
Update RKObjectMapper to return a single NSError on failure. Update error codes
Improve description output on RKAttributeMapping
Initial integration of new RKMappingDescriptor class. Convert RKObjectMapper to ARC
Merge pull request #889 from jakemaskiewicz/patch-1

Multiple Declarations Removed
License boilerplate
Small doc update
Execute existingObjectWithID: within a performBlockAndWait:
Add assertion for retrieval of object for delivery across thread boundaries
Eliminate unnecessary manual tracking of inserted objects in favor of MOC insertedObjects:
Fix redeclaration build error under ObjC++. fixes #774
Eliminate modern Objective-C dictionary access in favor of method call
Update XMLReader to latest bits. Fix build error under ARC. closes #863, #817
Use a predicate template with substitution values during search indexing for performance
Generalize status code handling
Remove Deprecations section and begin unwinding RKURL API's
Update object loader to properly propagate errors back from mapper