- Removed Jessie and Trusty from tests (for this role there's no difference between the various versions and the Travis CI job times out).

# Conflicts:
#	templates/receiver.sh

# Conflicts:
#	tests/playbook.yml

- Move pre_tasks to a seperate play because run_once is currently not supported with the free strategy.

# Conflicts:
#	tests/playbook.yml

- Move pre_tasks to a seperate play because run_once is currently not supported with the free strategy.

# Conflicts:
#	tests/playbook.yml

- Enable free Ansible strategy to allow each host to proceed as fast as it can to help speed up some plays.

- Caching the entire virtualenv in Travis CI has proven to cause issues, caching just pip's cache directory.

- Use privileged container instead of just adding the sys_admin capability (the latter has been shown to be cause unrelated issues).

- Seems to work but lacks tests.