Update Readme file : Re-write "How it works" section
Merge branch 'master' of github.com:yetu/ansible-smartstack

# By Adham Helal
# Via Adham Helal
* 'master' of github.com:yetu/ansible-smartstack:
  smartstack user has no shell
  all tasks are idempotent
  Using gem instead of shell
  removed bridging from vagrant file
  use ruby 2.1 instead of ruby 2.0