live reload support

This has added the `--liveReload` option

`browservefy path --liveReload` will now run a liveReload server on a second port (`9967`) which means when your code (anything in `process.cwd()`) changes the page will refresh automatically (after a 1 second delay)

You can also use `browservefy path --liveReload={{PORT}}` to run the second server on an arbitary port.