GearSwap: Allow users to expand the search path for included files.
Only works for subdirectories of the fixed search path.
Rebuild of Mote-Libs using Modes class vars.
Copy obsoleted library into rev1 subdirectory to prevent immediate user breakage.
Redirect default include() calls to that subdirectory if user files are not
up-to-date.
Merge pull request #1027 from Kinematics/4.1-dev

4.1 dev