A new more conformant look for Datagridle

The old Datagridle was ugly — pink and pale blue, tiny fonts, gross buttons. This one is mostly grayscale and leaner — it will fit in with almost anything when it's embedded and won't be an eyesore. It also has other improvements like proper iconography and alignment.

The Broken old (sent a pull request):
![screenshot from 2013-09-29 21 18 45](https://f.cloud.github.com/assets/3664587/1234904/009175c2-2991-11e3-82fc-de05bcbcb1bd.png)
The Old:
![screenshot from 2013-09-29 21 41 07](https://f.cloud.github.com/assets/3664587/1234905/0968961c-2991-11e3-938f-064aeeae8a66.png)
The New:
![screenshot from 2013-09-29 22 28 07](https://f.cloud.github.com/assets/3664587/1234909/1e281afa-2991-11e3-8e0e-d1fdfef2aa44.png)