Add a new parameter in order to manage the ansible version on the master

The parameter is named ansible::install::version
install ansible via apt
add documentation about the provider and the version paremeter
add tests for new paremeters (provider and version)
add tests the ansible::master class
bump to 2.1.0
add 'experimental' support for RedHat Familly Operating system'
Manage playbooks

Add a playbooks class for managing a directory where you can store your
playbooks
fix name of spec file
fix typo
update packages dependency before ansible installation
fix name of the fact in the hiera example
add python-markupsafe before installing ansible via pip
change version number of ansible in an example
set the release date
add badges
Merge branch 'v2.1.0'