Added expanded functionality and revamped the way the Middleware works.

[Ewen-Zippedscript]

Added support for multiple databses. Added extended functionality for the declarative base metaclass. Added ModelBase with extension support. Maintained support for the original way it worked without requiring a tonne of lift on the dev side. Updated documentation to reflect changes.

[mfreeborn]

@Ewen-Zippedscript Are you interested in becoming a maintainer with merge rights?

[Ewen-Zippedscript]

Yeah, that would work for me!

[sheikh-hashir]

Man, merge it already...

[ammaraslam10]

+2