Settings screens redirect for certain roles

closes #3291
- adds redirects based on roles as defined in the case
- Modified rules so that for editors, /settings/general/ will redirect to /settings/users/
Rather than repeat the check for "is this user looking at his own profile" twice, why not extract that logic out so you only have to do those `get`s once?

ala

```javascript
var isOwnProfile = user.get('id') === currentUser.get('id'),
      isEditor = currentUser.get('isEditor'),
      isAuthor = currentUser.get('isAuthor');
//now you can write your if statements much more succinctly and DRYer
if (....)//use those pretty new vars!
```