Install rbenv systemwide

    CLI Example:

    .. code-block:: bash

        salt '*' rbenv.install

def install(runas=None, path=None):
    '''
    Install rbenv systemwide

    CLI Example:

    .. code-block:: bash

        salt '*' rbenv.install
    '''
    path = path or _rbenv_path(runas)
    path = os.path.expanduser(path)
    return _install_rbenv(path, runas) and _install_ruby_build(path, runas)