Updating LICENSE
Update README
Implementing multipart form request parameter serialization
Add NSParameterAssert on setRequestSerializer, to prevent nil
Remove unused AFCompletionBlock
Implementing NSCoding & NSCopying

Removing conditional compilation for SystemConfiguration and MobileCoreServices

Minor refactoring
Adding NSCoding & NSCopying to AFSerialization
Minor adjustments to NSCopying behavior
Merge branch '2.0' of github.com:AFNetworking/AFNetworking into 2.0