Change deployment directory to use godep instead of .godir

[nrkfeller]

Its seems that the new "best way" of performing a deployment with heroku is to use the tools/godep. I would be more than happy to re-write that portion of manual/code. Let me know!

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Fetching set buildpack https://github.com/kr/heroku-buildpack-go.git... done
remote: -----> Go app detected
remote:  !     Deprecated, .godir file found!
remote:  !     Please switch to godeps (github.com/tools/godep) ASAP
remote: -----> Installing go1.5... done
remote: 
remote:        Tired of waiting for bzr and hg?
remote:        Use github.com/tools/godep for faster deploys.
remote: 
remote: -----> Installing Virtualenv... done
remote: -----> Installing Mercurial... done
remote: -----> Installing Bazaar... done
remote: -----> Running: go get -tags heroku ./...
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types -> web
remote: 
remote: -----> Compressing...
remote:        Done: 2.1M
remote: -----> Launching...
remote:        Released v3
remote:        https://mighty-citadel-93393.herokuapp.com/ deployed to Heroku
remote: 
remote: Verifying deploy... done.