[PATCH] auto translation

Round 2 of these.

This is again;

Just the process of creating pre-translated error templates from .po

As it stands:
  * Adds dependency on translation toolkit po2html for 'make dist' target.
  * Adds 'make translate' target
  * Adjusts 'make all' to do translation.
  * Adds --without-po2html configure option to optionally skip the
translation step unless explicitly asked for ('make translate').
  * Installs translated files properly, and skips silently if missing.
  * Un-installs translated files, and skips silently if missing.

Amos