converted into multi task
Merge pull request #8 from Bartvds/master

Modified grunt-jsbeautifier to work as a multi-task
Merge pull request #9 from mitermayer/updating-js-beautify-dep

Updated to fit new version of js-beautify
Version 0.1.7
Upgraded grunt to ~0.4.1, js-beautify to ~1.2.0. Fixed issues6, 7, 8, 9