Package Management 4 - Multiple Repositories

[rewrking]

In this last stage, a user should be able to create their own package repository and it to their project. Chalet would check the urls, and pull them down somewhere locally before resolving packages. They would be resolved where the last url takes precedence.

Lots of decisions at this point... Should Chalet go completely scoped and disallow local folders? This would be nice, but probably not realistic.