Meringue web server. Fist stable version.

- Reads a JSON config file for dispatch
  |- Exact URLs are entered in Literal and mapped to Actions
  |- Partial URLs are entered in Prefix and mapped to actions. Any URL matching the
     prefix will be processed by the Action. URLs are sanitized to prevent hijacks.
- Was tested to correctly serve images and HTML from disk.
Added a safety mechanism for accidental SIGINT.
Added in-console eval and repl capabilities.
Merge branch 'master' of https://github.com/spikesagal/Meringue