Add support for version control hosting via Upsun.com

[tylers-username]

With the addition of a .upsun/config.yaml and .environment, users who want to test out Fider quickly would be able deploy it to Upsun.com within a few short commands:

1. git clone {fider}
2. upsun project:create
3. upsun push

Upsun.com version-controls infrastructure, so Fider can define the default services and application requirements within the repository to reduce the setup burden of users who do not wish to deploy docker containers.