Satisfy npm requirements by lowercasing 'name' in package.json

In the spirit of "do first, ask for forgiveness later" I satisfied #21 and published Backbone.Marionette to npm.  I created a branch of master on my fork, and am publishing that.

I would like to get the change upstream if possible (hence this pull request.)  The only change required was to lowercase the "name" in package.json, as you can see.  Please let me know if I am a bad person or not.  I try to take constructive criticism well.  :)

Thank you!