Revert 6e76eb7
introduce the keyword "@base" in the extended recipes... #11

To manage more precisely recipes inheritance

extend: ubuntu-14.04

bootstrap:
- @base

setup:
- before_custom_step:
    - pull_image:
      - exec_in: docker pull ubuntu:trusty
- @base
- create_user:
    - name: sharrache
    - groups: sudo,admin

export: