fetch my-first-hoodie template from npm

[svnlto]

Depends on hoodiehq-archive/my-first-hoodie#55 action item.
I think this way we can also get rid of the custom caching logic we're doing now in hoodie-cli which comes in handy.

[boennemann]

Also the my-first-hoodie template should be copied over from a subfolder, so that we can apply grunt release magic on the template, without cluttering up the final install.

[svnlto]

handled in #135