imfreedom/ansible

Remove some old dependencies and move the mercurial dep to the role
---
vigil_address: "0.0.0.0"
vigil_arch: "x86_64"
vigil_checksum: "sha256:0c96b449d13bf65f1a15e9bd6c45987cc747de3575f0517fc2ac67366d14c08b"
vigil_group: "vigil"
vigil_home: "/var/lib/vigil"
vigil_port: "8080"
vigil_user: "vigil"
vigil_version: "v1.24.3"