Update to use npm

[luylucas10]

Hi. I'm learning knockout and I'm using this generator, but it's has some problems. The first is #17 that has problems with slashes, so I did the steps to correct this (install slash and use on babel function) and it works. The second is that bower needs to be replaced by npm or another manager, I don't know why bower will die, but it needs to be replaced, needing to change the gulp file. The third is that some packages have changed it's name (like knockout-projections).

I'm starting to learn js/node and I don't know how to correct this and make a pull-request.

Thanks.