Coltrane

- Add `--output` option to `record` command [19](https://github.com/adamghill/coltrane/issues/19) by [stlk](https://github.com/stlk)
- Nicer help output for CLI

- Add `--threads` option to `record` command

- Multithread `record` command
- Better console output for `record` command

- Fix elapsed time for `record` command
- More performant collection of markdown content files
- Don't include markdown or data when collecting static files while running `record`

- Add `--force` option to `create` command
- Automatically refresh the browser when markdown content or data is saved

- Fix generating root `index.md`