Show [+shortcut] on reddit.com/subreddits (fixes #529)
A few minor fixes sprinkled in as well
Fix a bug with variable scoping (len refers to the SAME VARIABLE in both loops)
let should really be implemented by browsers
Merge pull request #533 from mc10/shortcutfix

Fix issue #529 (show +shortcut on reddit.com/subreddits); also fix a bug with loops using the same variable