Patch nethack to mirror the experience of nethack.alt.org

Nethack.alt.org is widely seen as running the best version of Nethack around, but high latency impacts the experience.  This commit alters the version of nethack used by homebrew-games to incorporate the
patches used by nethack.alt.org.

The patch used features, most importantly, the [menucolors](http://bilious.alt.org/?11) and [statuscolors](http://bilious.alt.org/?142) patches, which are considered by many to be essential to TTY nethack.  This patch also incorporates >20 bugfixes, defines `AUTOPICKUP_EXCEPTIONS` (so that autopickup exceptions can be set), and adds several customization options.