New tile bar design (and removal of editbar)

The purpose of this PR is primarily for people to test it out before it goes into master. It's not perfect yet (some icons don't look amazing), but it should be functional.

Thoughts?

Here's what it looks like on Mac

![screen shot 2014-03-14 at 16 48 38](https://f.cloud.github.com/assets/59073/2422616/205b8bdc-ab90-11e3-8af2-84ebf1230be3.png)

And Linux (similar on Windows):
![screen shot 2014-03-14 at 16 53 39](https://f.cloud.github.com/assets/59073/2422682/dc118476-ab90-11e3-83e5-b4df762070b8.png)


Light versions:

Mac:
![screen shot 2014-03-14 at 16 50 05](https://f.cloud.github.com/assets/59073/2422633/6e2eb082-ab90-11e3-839e-8bdd27656fb0.png)

Linux (similar on Windows):

![screen shot 2014-03-14 at 16 53 27](https://f.cloud.github.com/assets/59073/2422685/e1d55586-ab90-11e3-9287-1ef86441eab8.png)


Functionally what changes is that the paths are now at the top and when you hit `Command-E`/`Ctrl-E` the path is replaced with the Goto UI, which is kind of nice. Also, the entire title bar (including paths) is now draggable.