v0.1 for Blender 2.80

This is the first release of the Quake MAP importer for Blender. Using this add-on, you can import the convex geometry that is used to design Quake levels and use it for collision data (or whatever) in a modern game engine.

Currently, the importer just imports the MAP and optionally removes certain types of data (clip brushes and triggers), putting the resulting objects into a collection named after the map file. It's likely that I will add entity grouping and options to filter other types of geometry.