indent level plugin

![screen shot 2014-08-19 at 11 56 37 pm](https://cloud.githubusercontent.com/assets/6377293/3976574/65117134-2826-11e4-94e4-c4da778d6dd8.png)
Indention level highlighting.

I've also changed the color scheme to the 80's and set the scroll off to 10.  I prefer to be well above the bottom of the page.