added collectd_dir_src variable.
tox now passes arguments to test run.sh script.

added tasks/build.yml

added tasks/configure.yml

moved actions into build.yml.

usage of vagrant-hostmanager plugin.
vagrant now performs the provisioning.

added ansible_ssh_user=vagrant to ansible.cfg.

added public_network to Vagrantfile so tests can fetch remote tarball.
ansible now used to perform the provisioning of the Vagrant box.

tox can now run vagrant tests.

added collectd_install_process variable.
added collectd_build_dependencies variable.
added collectd_build_options variable.
added collectd_plugin_dependencies variable.