allow for custom templates and stylesheet assets

I'm not totally sure this is the best way to go about this, but I'd like to be able to have templates for repo and branch presentation live outside the module.

This change adds two params: 
views: Path to an alternate views folder containing your view templates of choice
assets: Path to an alternate public folder containing your stylesheets and javascript files.

Example Usage: 
moire start --views=PATH_TO_CUSTOM_VIEWS_FOLDER