Fix Cocoapods Badges

Had to change URLs to use `https` instead of `http`
Update Cocoapods to v0.29

Add spec's social_media_url
Bump Podfile.lock for 0.29.0
Fix various build warnings under Xcode 5.1
Corrects syntax in README.md for example code on how to map an error into NSError with an object manager
Merge pull request #1733 from obuseme/development

Corrects syntax in README.md for example code on how to map an error int...
Ensure MOC isn't save when error is mapped
Cast mock context to placate travis
Add response descriptors to response operations of failing tests
Merge pull request #1736 from segiddins/bugfix/1735-dont-save-context-on-error

Ensure MOC isn't save when error is mapped