Added tag 2.0.2 for changeset a29b8da4ff26
Bumped to 2.0.3 in preparation for next release.
Fix NameError in Gnome detection (would have left Gnome disabled in all cases)
Backend viability/priority checks now are more aggressive about module presence checking, requesting __name__ from imported modules to force the demand importer to actually attempt the import. Fixes #112.