Refactor into libraries

[nexushoratio]

This was waiting until Logger had the ability to save/restore a configuration. That is done now.

Probably a case of over engineering, but here we go:

• [x] #173
• [x] base (pure JS stuff)
• [x] xunit (Testing is getting large enough)
• [x] userscript (cross manager things like platform info, if we need wrappers for {get,set}Value, etc)
• [x] web (anything that uses the WEB API)
• [ ] widgets (tabbed ui, scroller, etc)
  • [x] #190
  • [x] #191
  • [ ] #192
  • [ ] #185
  • [ ] #258
• [ ] spa
• [x] Service to base