use github repos as templates
update download-github-repo dependency
In the absence of an internet connection, make `harp init` use vendored default boilerplate.
s/template/boilerplate/
test CLI behavior with nixt, starting with `harp init`
Merge pull request #234 from zeke/templates

Add support for Github-powered templates.
cleanup of package.json
adds Zeke Sikelianos to contributors list