Finish the migration to GitHub

[IanEmmons]

Parliament is largely migrated to GitHub, but the migration is not quite finished. The following tasks (and perhaps others) remain:

• Finish implementing the "missing" tests in the temporal index
• Post the binary dependencies that cannot be retrieved from Nexus
• Update the documentation
• Update env vars required on each platform (e.g., LINUX_DISTRO)
• Do a new release from GitHub

[IanEmmons]

Resolved this ticket with release of version 2.7.12 on 2019-04-17.