A Standard Bootstrap Progress Bar.

    http://getbootstrap.com/components/#progress

    param args (Array of Numbers: 0-100): Percent of Progress Bars
    param context (String): Adds 'progress-bar-{context} to the class attribute
    param contexts (Array of Strings): Cycles through contexts for stacked bars
    param text (String): True: shows value within the bar, False: uses sr span
    param striped (Boolean): Adds 'progress-bar-striped' to the class attribute
    param animated (Boolean): Adds 'active' to the class attribute if striped
    param min_val (0): Used for the aria-min value
    param max_val (0): Used for the aria-max value

def bs_progress_bar(*args, **kwargs):
    """A Standard Bootstrap Progress Bar.

    http://getbootstrap.com/components/#progress

    param args (Array of Numbers: 0-100): Percent of Progress Bars
    param context (String): Adds 'progress-bar-{context} to the class attribute
    param contexts (Array of Strings): Cycles through contexts for stacked bars
    param text (String): True: shows value within the bar, False: uses sr span
    param striped (Boolean): Adds 'progress-bar-striped' to the class attribute
    param animated (Boolean): Adds 'active' to the class attribute if striped
    param min_val (0): Used for the aria-min value
    param max_val (0): Used for the aria-max value
    """

    bars = []
    contexts = kwargs.get(
        'contexts',
        ['', 'success', 'info', 'warning', 'danger']
    )

    for ndx, arg in enumerate(args):
        bars.append(
            dict(percent=arg,
                 context=kwargs.get('context', contexts[ndx % len(contexts)]))
        )

    return {
        'bars': bars,
        'text': kwargs.pop('text', False),
        'striped': kwargs.pop('striped', False),
        'animated': kwargs.pop('animated', False),
        'min_val': kwargs.pop('min_val', 0),
        'max_val': kwargs.pop('max_val', 100),
    }