npm bower grunt lifecycle

[Marc Rodriguez-Estivill]

Add support for "npm install" "bower install" "grunt" lifecycle in one task

[Ryan Dunckel]

This would be useful for gulp builds (if they are supported in the future) as well, via issue #21

[Ryan Dunckel]

After thinking about it more, this is probably largely unnecessary as one could simply include separate tasks for each step.

[Marcin Oles]

Tasks should be as atomic as possible - combining multiple tasks into one is unnecessary. In this case it's possible to add "npm" task, "Node.js" custom task with script set to bower, and "Grunt" task.