Log Message:
Update to 0.042:

0.042	2014-10-04

 [ Documentation ]
 - Document the warning emitted when you provide options to a function you
   are unimporting.

 [ Other ]
 - Housekeeping on %TRACKED.

0.041_02	2014-09-19

 [ Bug Fixes ]
 - Option validation needs to happen after expanding tags.

0.041_01	2014-09-18

 - Add an `unimport` feature.