Initial commit of Calf

Summary: Initial commit of Calf which resolves T3166.

Test Plan: I am currently unable to test this package due to an issue with the audio deamon JACK (T1883). Thanks for reviewing this package and I am sorry there isn't a test plan but I thought I should upload this anyway so that someone does not have to repackage Calf once the issue is fixed.

Reviewers: Triage Team, DataDrake

Reviewed By: Triage Team, DataDrake

Subscribers: DataDrake, JoshStrobl

Maniphest Tasks: T3166

Differential Revision: https://dev.solus-project.com/D1338