anchor.diff:  RUN yum -y install \
       PyYAML \
       python-coverage \
  +    python-devel \
       python-httplib2 \
       python-jinja2 \
       python-keyczar \
  
positive.code: RUN yum -y install \
      epel-release \
      file \
      git \
      make \
      mercurial \
  
negative.code:     python-setuptools \
      python-virtualenv
  RUN pip install --upgrade jinja2
  RUN rpm -e --nodeps python-crypto; pip install pycrypto
  RUN /bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
  RUN mkdir /etc/ansible/
  RUN /bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
  