Version 0.5

Major changes:
-Expanded permissions to <all_urls> (previously, users were restricted
to the sites I'd already configured... oops!)
-Added an icon to the address bar showing when WKN is activated on a
page. This can be disabled on the Options page.

Bug fixes:
-Options page now loads current settings properly.
-List of comics/sites now has alternating background colors so that
entries are more visually distinct from one another.