fixes #187

updated the dock, and the notifications
Remove all of towtruck-share window (replaced with towtruck-about).  Open towtruck-about when window is closed, fixes #185
updating the notifications UI
updated the chat window
updated the Settings window UI
starting to update the site again

ill move the css to the style.css
updating the site UI again - ill go back and refactor the CSS
updating the site again
refactoring the CSS
refactored the css and html
updated some more styles on the site
updated the site
Adding alt tags and fixing other validation issues.
Updating the default URL for towtruck.js.
Adding the towtruck.xpi. (Verified correct content-type)
Adding a couple images for the README.
Moving readme images to images folder. -- oops
Adding Add-on documentation.
Remove double bootstrap.css include.
Fix formatting issue #188 -- pre styling from bootstrap was messing with ACE.