Extension UI stuff:
- Remove annoying icon on Save and Delete buttons
- Style popup if needed
- Support extended notes
- Keyboard shortcuts all around (to bring up popup, to submit/delete from within popup)
- Change toolbar button so that annoying arrow isn't there

Stuff in code:
- Abstract notifications in bookie-core and get rid of duplications in bookie-firefox
- Get rid of needed commentingg out of call to console.log in bookie-core

Error checking:
- Report problems with wrong or unset URL/api key
