Start a node.

    CLI Example:

    .. code-block:: bash

        salt-cloud -a start mymachine

def start(name, call=None):
    '''
    Start a node.

    CLI Example:

    .. code-block:: bash

        salt-cloud -a start mymachine
    '''
    if call != 'action':
        raise SaltCloudSystemExit(
            'The show_instance action must be called with -a or --action.'
        )

    data = query(action='ve', command='{0}/start'.format(name), method='PUT')

    if 'error' in data:
        return data['error']

    return {'Started': '{0} was started.'.format(name)}