Front End Work

Lots of work here! Each of the commits in this Pull Request has information about what was done. The tl;dr is that we made lots of UI changes for the better. This has been tested in latest versions of Chrome, Firefox, Safari on Mac and it works in Internet Explorer versions 10+. 

Lower versions of IE will need some extra help, but they account for <10% of users so I think this should get us going for MVP. 

Please pull this down and make sure I didn't catastrophically break any Rails bits, but I think not.

Cheers!
What about DRYing these up? Something like:

```haml
- (1..6).each do |i|
  %div.incomplete{id: "progress-indicator-step#{i}}
    %a= i
```

Also, I have picked up a habit we standardized at Change of using underscores in ids and dashes in classes. I’m not saying we must do it, but we should be consistent. @ericisaiah was the one who did most of the front-end, so we should do whatever he suggests (which I suspect you’re already doing, I just noticed the dashes in the id and it stuck out to me.)