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
Merge remote-tracking branch 'RestKit/development' into block-identification-predicate
Typo in doc for RKSearchPredicate

suclass => subclass
Merge pull request #1777 from rex64/patch-1

Typo in doc for RKSearchPredicate
Bump Ruby version to 2.0.0-p353
Fix outdated documentation of cancellation behaviors. closes #1797
Using proper error field for warning
Merge pull request #1799 from RyzacInc/FixUsingProperErrorField

Using proper error field for warning
Add Git submodule step to Testing README.md

fixes #1800
Added missing init call.
Merge pull request #1810 from matej/initFix

Added missing init call