QUALITY: Renamed role to ansible-common; added 'common' prefix to variables.
ENHANCE: Made bash aliases and environment variables system-wide; removed ubuntu_user variable.
NEW: Added ability to clone specified list of git repositories.
QUALITY: Renamed 'command' key to 'value' in environment_variables task.
NEW: Added ability to add specified list of user accounts.
ENHANCE: Changed min_ansible_version to 1.7.