Make OVCHTTPSessionManager available only to OS X 10.9 and iOS 7 SDKs
Add subspecs
Adding BFTask support
Add BFTask support for HEAD request
Add PromiseKit support to OVCHTTPRequestOperationManager
Should only be available on OSX 10.9 and iOS 7
Add PromiseKit support
Add Promise support for OVCHTTPSessionManager subclasses
Merge pull request #42 from gonzalezreal/promisekit-support

Add PromiseKit support