The path of storage containers taken from lxc-config, instead of using a constant for lxc>=1.0.0.
 * for lxc to 1.0.0 using constant Vagrant::LXC::Driver::DEFAULT_CONTAINERS_PATH
 * change method Vagrant::LXC::Driver::CLI#version to call lxc-create if lxc-version command not exists (to lxc version 1.0.0)
Merge pull request #317 from azomazo/detect_container_path_by_lxc_config

The path of storage containers taken from lxc-config, instead of using a constant