Releases for Commons Origins

All fixes from RC1, and a fix to a typo causing fieldset to throw a JS error.

• Cleanup by Zarabadoo: Remove old comment that means nothing now that the functionality has been removed.
• Coding standards by Zarabadoo: Make selectors lowercase.
• Coding standards by Zarabadoo: Break selectors onto separate lines.
• Coding standards by Zarabadoo: Fix a typo in comments.
• #1956578 by Zarabadoo: Remove unused mixins and invisible classes from core files.
• #1956578 by Zarabadoo: Remove IE legacy support as there is not support for IE under v8 and simplify the Compass library inclusion.
• #1955464 by Zarabadoo: Clean up scss and css to remove empty style containers and orphaned comments.
• #1955480 by Zarabadoo: Change all instance of "$vars" to "$variables" and add a $hook argument to all process and preprocess functions.
• #1955468 by Zarabadoo: Remove unused theme-settings.php.
• #1955468 by Zarabadoo: Remove commented out functions and extraneous comments.
• Tab contrast by Zarabadoo: Replace the missing background on active tabs.
• #1954314 by Zarabadoo: Reposition the type list on small screens.