added Ansible 1.9 to travis
replaced ansible_os_family with ansible_distribution
redhat: /etc/sysconfig/network - removed an obsolete task and added idempotency to the other one
mentioned Ansible 1.6+ compatibility
updated ansible_distributions to better reflect the Readme
Merge pull request #2 from danvaida/master

idempotent task updating /etc/sysconfig/network, testing with Ansible 1.9 and updated to ansible_distributions