Added alternate models of initialization, adding cover art support.

The MangaDex API has somewhat stabilized, for now, so I don't see too many breaking changes being made.

Fixes a bug that made the pypi release unusable

Adds a lot of features, including a 100% implementation of all available API endpoints and utilization of the permission system.

Contains methods to search through the various listings.

Adds support for chapters, users, and groups.

Adds basic models and a tag cache.

The initial release.