fixed initial upload/download task progress updates
trivial documentation/comments fix

AFHTTPClient -> AFHTTPRequestOperationManager
fix cocoa pods pod spec to include AFNetworking.h as it used to; fix AFNetworking.h to work on pre OS X 10.9 & pre iOS 7.0.
[Issue #1406] Fixing request serializers to not override existing header field values with defaults
Merge branch 'master' of github.com:AFNetworking/AFNetworking
Merge pull request #1401 from haikusw/minor-doc-fix

trivial documentation/comments fix
[Issue #1404] Adding missing #ifdef for iOS 7 compatibility
Merge branch 'master' of github.com:AFNetworking/AFNetworking
Merge pull request #1396 from vlas-voloshin/master

AFURLSessionManager makes invalid initial upload/download task progress updates
Merge pull request #1402 from haikusw/cocoapodspec-AFNetworking.h-fix

Fix for AFNetworking.h left out of cocoapod for AFNetworking. Also Needed conditionalization of Session includes.
Update README.md

NSSearchPathForDirectoriesInDomains returns an array of NSString.
The NSString has to be converted to NSURL.
Merge pull request #1413 from l4u/patch-2

Update README.md