package iblrig in a pip installable

[oliche]

Right now the settings and fixtures will need to go with the ride by putting them into the iblrig folder
This is what I did in the theorists branch for the settings.

However this is impractical for a rig as the settings files will be hard to find, and we may have permission errors.
A recommended alternative is to define folders in the APP_DATA or similar to export settings and fixtures such as Bonsai