Merge branch 'readme' into dev
Update gcli: change 'user_name' argument to 'username'
Update gcli: change configer module name to config
Merge branch 'dev' into master

Changes:
  - Change 'user_name' to 'username'
  - Change Git work flow to a variation of 'A Git Workflow for Agile
    Teams' [http://reinh.com/blog/2009/03/02/a-git-workflow-for-agile-teams.html]