Automatic Translation of .PO and Error Pages

Automatic Translation of .PO and Error Pages

This patch embeds the process of creating pre-translated error templates
from .po

 * installs/uninstalls base templates for failover backup if no
   translation is to be done.
 * 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.