Lou's List

Adds additional features onto Lou's List.

- Save classes to a list for future reference
- Click on classes to see conflicts with other selected classes
- Hover your mouse over a class on the sidebar to see additional information

Changes

1.5 -
* updated to accommodate 11/12/13 changes to Lou's List.
1.4 -
* bug fix
1.3 -
* allow saving of selected items in lists
* bug fixes
1.2 -
* fixed a bug preventing the extension from launching upon first use
* backend changes