Don't use connection keep alive for HTTP requests (Fixes #437)
chore: improve package registration docs

Make it a bit clearer that people should be using Git tags and
remembering to push their tags to the remote endpoint.
Merge pull request #478 from wibblymat/issue-437

Don't use connection keep alive for HTTP requests (Fixes #437)
readme: correct tar.gz to tar
Merge pull request #509 from passy/readme-tar

Update readme to reflect supported archive types