Implemented AFNetworking 2.2.3 support.
Merge branch 'develop' into issue/1618-AFNetworking2
Fixes for the AFNetworking 2.2.3 migration.
Some additional fixes for AFNetworking 2.2.3.
Updated WordPressApi pod location for AFNetworking 2.2.3.
Merged develop -> issue/1618-AFNetworking2.
Merge branch 'develop' into issue/1618-AFNetworking2
Merge branch 'develop' into issue/1618-AFNetworking2

Conflicts:
	WordPress/Classes/ReaderPost.m
Merge pull request #1703 from wordpress-mobile/issue/1618-AFNetworking2

Issue/1618 - AFNetworking 2.2.3 support