Update README.md
Added contributing guidelines
1.4.0: Using the AnyJSON project instead of our own implementation
Update readme
Adding cocoapods badges
1.5.0: removed AnyJSON
Fix podspec
Version 1.6.0. Warning: backwards incompatible changes! Removed executeBlockWhenDownloaded:onFailure:, replaced with registerSuccessBlock:failureBlock:.
Merge pull request #1 from gangverk/master

Abc