Merge pull request #4 from rakitzis/refactor

Refactor errors.New(fmt.Sprintf as fmt.Errorf and add Make.sh

want to keep this on people's radar as we work on master over the next three days.
Update picket to work with docker: protocol version 1.14
Fix instructions
Merge pull request #7 from nordsieck/newest-docker

Update picket to work with docker: protocol version 1.14, new instructions, new box for use with vagrant
Add Gomock