Basic integreation with LOVE2D.

Nothing out of the ordinary, just moving some code around and adding the callback functions.
It's offical, it's a game now.

Game now has rudimentary (testing) drawing functions for
the playfield and its pieces.

Still massive work in progress, but you can drop pieces
and have them clear + fall correctly!
The love branch is stable enough to merge in for good now

Playable version, go figure, huh.
Updating the readme slightly