[Issue #1336] Updating response serializer validation error message to be more appropriate in user-facing situations
Adding documentation for AFSecurityPolicy
Updating documentation for default session manager response serializers
Adding upload/download progress animated associated objects

Using af_ prefix on associated object properties
Adding __unused declarations to fix warnings
dispatch_sync -> dispatch_async
Enabling and fixing extensive compiler warnings
[Issue #1366] Adding shouldUseCredentialStorage and credential properties to AFHTTPRequestOperationManager
Adding documentation to AFNetworkReachabilityManager
Minor edit to AFHTTPSessionManager documentation
Adding first pass of example usage
Cleaning up AFNetworkReachabilityManager
Replacing use of hard-coded keypaths with equivalent NSStringFromSelector of selector literals
Replacing use of hard-coded keypaths with equivalent NSStringFromSelector of selector literals in AFURLSessionManager
Adding note about Apple's Reachability sample code
Changing contact information
Editing section about Unit Testing
Update README.md
Adding .travis.yml
Porting over revert of reachability regression