wellington formula

Hi, I would like to add the [wellington](https://github.com/wellington/wellington) project to brew.  I'm new to building formulas, so any help would be great.  I noticed that go get ./... does not work well with brew.  I took tips from the other go projects to explicitly require all packages as go_resources, including the main repo which has 5 packages in it.

Questions:

* This formula is dependent on libsass which requires compiling c code, did I properly mark that requirement?
* I'd like to alias this project to `wt` which is the name of the cli tool, how is that done?
That was actually a requirement, not a request. ;) Our preference is to use stable versions. If there are things you need that aren't in the stable version, you can apply the relevant commit(s) as patches to the stable version.