Added in a property to handle invalid SSL certs
Merge branch 'master' into invalid-ssl
Removed invalid SSL macro from new 1.2.0 code
Updated documentation
Added invalidSSL flag to AFHTTPClient
Set the operation flag in HTTPRequestOperationWithRequest
Documentation update
Pinning certificates will now trust all derived certificates.
Merge remote-tracking branch 'upstream/master' into invalid-ssl

Conflicts:
	AFNetworking/AFURLConnectionOperation.h
Fixes SecTrustCreateWithCertificates expecting an array as first argument.
Merged upstream/master back to resolve conflicts
Merges master.
Merge pull request #882 from OliverLetterer/derived-certificates

Pinning certificates will now trust all derived certificates.
Now using errSecSuccess instead of noErr for Security frameworks OSStatus.
Now using NSParameterAssert instead of NSCParameterAssert.
Merge branch 'master' into invalid-ssl
Merge pull request #902 from OliverLetterer/master

Some minor stuff
Fixed if/else logic
Merge branch 'master' into invalid-ssl
Check for finished operations in order to increments the `numberOfFinishedOperations` count