Turn "TODO"'s and "OPT"'s into github issues

[jrenaud90]

Ctrl-f "TODO" and "OPT" throughout the project and make a new issue for each item. It is okay if you don't know what exactly to put (labels, comments, etc.). Just try to make educated guesses and use the context around the comment.

"OPT" refers to areas of the code that could be optimized in the future.