Topic/releng

@mattn

Instead of using submodules (which we still would need to tweak GOPATH to include them dirs in the build process), I just decided to automate the goxc workflow w/o the use of godep.

Seems to work fine on wercker :) https://app.wercker.com/#buildstep/54124017c3f74b3d290d14c5

closes #194