Warden 0.2.1

Upgrade Notes:

If you're upgrading from version 0.1.x to 0.2.x for the first time, please reference upgrade notes for Warden 0.2.0 and plan accordingly.

Enhancements:

• Added support for using ~/.warden/.env to configure aspects of Global Services (see docs for details) (issue #13)
• Updated sync start to no longer call mutagen daemon start as Mutagen now does this automatically.
• Updated warden install to include short hostname in the common name used when signing the Root CA used by Warden allowing easier identification and interoperability when a single user is running Warden across multiple workstations.