Something Awful Last Read Redux

This is a Chrome port of the Firefox SALR extension for the Something Awful Forums.

The original port was done by Scott Ferguson, and has been handed off to this "Redux" branch.

In order to use the highlighting features you must have the appropriate thread tracking options turned on in your User Control Panel on the forums. Since the forums now track threads for you, SALR only enhances the functionality rather than implement it.

Notable features:
- Quick reply
- Thread highlighting
- Mouse navigation
- Keyboard shortcuts
- Order previously seen threads first
- Highlight when people quote you
- Page navigator
- Forums jump list