Major modifications and refactoring:
 - Added bootstrap.js
 - Changed tabscroll.js into a javascript module
 - Added PowerShell packaging script.
 - Other misc changes for restartless functionality
Continued major development:
- Got options UI working.
- Added loading of default preferences.
- Separated code in to multiple modules.
- Removed obsolete files.
- Changed package script to use 7zip, which fixed
  issue with Firefox not being able to find files
  within the XPI.