giter8 0.4.1 with library shared by app and plugin

[n8han]

I just did a quick refactor to enable code sharing between the giter8 app and its plugin, so that they can both do things like talk to ls.implicit.ly without duplicating a ton of code. I hope I didn't break anything but it's possible I did, so I would appreciate people pulling the latest and making sure their favorite features still work. I won't release this tonight, but soon.

To use the new plugin (which now supports all template features of the app) you don't have to wait for a release, just use a source dependency like this:

https://github.com/unfiltered/unfiltered.g8/blob/master/project/project/plugins.scala

Nathan