Fixed a lot of Issues. Not all though.

- Capitalized verbs
- Selected Text and Image use unique id for object.id
- Displays username on extension, when logged in.
- Cleaned up some localStorage issues.
- Removed TinCan login failure alert and replaced with my own.
- Added an icon (icon-128.png).
- Changed "Send Selection" in context menu to "I Learned This". I
thought it sounded better...
- Last, and again, the only website that returns a 403 code
"www.wikipedia.org" still is not working. My plan is to flush the
database. I think this might fix it.
Merge pull request #2 from Lindy21/master

Fixed a lot of Issues. Not all though.