refresh account settings page (bug 1103228)

- todo: chrome/safari compatibility
- moves settings/main.html to settings.html to match route, with all other PRs the settings template folder will be removed
- gets rid of a ton of old settings page CSS, cruft markup, and unneeded classes

![screen shot 2014-12-26 at 5 58 30 pm](https://cloud.githubusercontent.com/assets/674727/5560112/e40e31fe-8d28-11e4-886a-bb161a23cf1c.png)
![screen shot 2014-12-26 at 5 58 19 pm](https://cloud.githubusercontent.com/assets/674727/5560113/e5195c22-8d28-11e4-8847-cab51a1e74f2.png)
![screen shot 2014-12-26 at 5 58 43 pm](https://cloud.githubusercontent.com/assets/674727/5560114/e630be5c-8d28-11e4-8e04-40bcdd96d0c8.png)