ST3 compatibility
Made plugins Python 3 compatible.  Had to add 'as bases' to each import for TextCommands.bases, because it broke all of the plugins.  Line Length appears to not be working; I'm not sure why exactly, but the data all works up until we get to the sublime.view.replace call at the end.  Should still be fine in ST2, though.
Updated util.py copyright
Update README.md

Added info about ST3 compatibility