[There and Back Again] Theme reviewer tools to AMO to set up the Guillotine

- Tests pass
- Made editors.css a Stylus stylesheet to ease my pain, gave themes reviewer tools their own asset bundle
- Keeping theme tools on Marketplace for now as a fallback tool in case this one breaks + for future use for wallpapers/ringtones review

![screen shot 2014-02-05 at 9 44 07 am](https://f.cloud.github.com/assets/674727/2089903/3b86a7b8-8e8d-11e3-9fd7-815972bded7e.png)
![screen shot 2014-02-05 at 9 44 15 am](https://f.cloud.github.com/assets/674727/2089904/3c624cd2-8e8d-11e3-9e24-75a6fbff18de.png)
![screen shot 2014-02-05 at 9 44 25 am](https://f.cloud.github.com/assets/674727/2089906/3ebc54be-8e8d-11e3-992b-b9875c37d514.png)
![screen shot 2014-02-05 at 9 44 48 am](https://f.cloud.github.com/assets/674727/2089908/3f78d954-8e8d-11e3-9549-3901cda112e9.png)
![screen shot 2014-02-05 at 9 44 38 am](https://f.cloud.github.com/assets/674727/2089909/40238818-8e8d-11e3-8f66-1b727909209c.png)