wellington formula

Hi, I would like to add the 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?
Instead of declaring it as a resource, you can move the unpacked source package into the correct location - take a look at [this line](https://github.com/mistydemeo/homebrew-digipres/blob/master/siegfried.rb#L32) in the siegfried formula, for example.