[WIP] Add go build and cgo run and build support

So.. I've heard we are missing this feature... :)

![snapshot61](https://f.cloud.github.com/assets/607868/1759802/6a1fbdc8-66a4-11e3-8872-bd5f4b0347ee.png)

I'd like to get this in before releasing the beta version of the plugin.

Thanks.