Added Forum model classes.
Added and integrated AFNetworking.
Added ForumCategoryRepository without implementation.
Added and integrated HTMLReader.
Added String and NSURLComponents extensions.
Implemented ForumCategoryRepository logic.
Implemented caching in ForumCategoryRepository.
Implemented ForumThreadRepository.
Extracted some common parsing code into a ForumParser class.
Implemented ForumPostRepository.
Moved some strings into a Settings.plist file.
Removed repository caching and added paging requests.
Merge branch 'feature/forum-data' into develop