Add Option to Keep Block Comment Indentation

[guiguan]

Thanks for this awesome beautifier.

Using js-beautify on following block comment (my preferred style):

/**
* @Author: Guan Gui <guiguan>
* @Date:   2016-04-03T18:26:49+10:00
* @Last modified by:   guiguan
* @Last modified time: 2016-04-05T11:32:31+10:00
*/

It becomes:

/**
 * @Author: Guan Gui <guiguan>
 * @Date:   2016-04-03T18:26:49+10:00
 * @Last modified by:   guiguan
 * @Last modified time: 2016-04-05T11:32:31+10:00
 */

Could you please add an option to keep block comment indentation?

[bitwiseman]

For now, if you don't start all your lines with *, it will not reindent.