Devoncarew find view

@ussuri

Add an implementation of a 'goto line' dialog (fixes #827). The look is approximately based on Chrome's inline find dialog. There is also a little bit of work towards replacing Ace's default find dialog, but that is not completed for this CL.

![screen shot 2014-04-28 at 8 32 15 am](https://cloud.githubusercontent.com/assets/1269969/2819067/80c124a0-ceea-11e3-823a-bb732946d4e4.png)