Fix gaelic type link in README.
Add port and thread-count options for cli.

Also move getenv to utils ns.
Define meta->write-path and modify behaviour of Parse->path.
Modify behaviour of File->Parse to always define path on the Parse it creates.
Rename parsers.helpers to parsers.utils.

Move Parse->path to html.
Modify repl/start-server have sane defaults which may be overwritten.