Update various docstrings.
Update system encoding manipulation.
Update various docstrings.
Remove "miCreateOtherOptionsNodesForURG" mel procedure call in "Maya_MR_Standard" template.

Closes KelSolaar/sIBL_GUI#193
Remove "miCreateOtherOptionsNodesForURG" mel procedure call in "Maya_MR_Lightsmith" template.
Update "CHANGES.rst" file.
Update "Templates_Releases.rc" file.
Merge branch 'feature/v2.1.1' into develop