Add Date header, from delayed deliver if present else now

Helper to use rerun for continuous local testing in development

Baseline bidirectional working for text bodies

Need internal for gateway too

Use available UTF-8 locale

Import new Internal module for stanzaToElement

Enable UTF-8 locale in CI, build everything before running tests

Update tests for released network-protocol-xmpp

Need to have tasty-discover around to run the tests

CI needs gnutls

CI needs libxml2 also

More deps for CI

Need to update cabal metadata

CI needs cabal-install

Add hlint to CI

Initial commit