Implement wish 109443 (E-mail report on compile failure).

This adds two configuration file options:

email-address: kdesvn-build uses this address to send email from.  You don't
have to set it, but it's probably better if you do if you use any features
kdesvn-build will send email for (like the one I'm committing).

email-on-compile-error: This should be set to the email address to send email
to whenever a build error occurs.

The email isn't sent until kdesvn-build is done trying to build/install modules
so that kdesvn-build can collate the results first.  kdesvn-build will also
include excerpts from the error log so that you won't necessarily have to pull
up the log to see what happened.  If you didn't set an email address to send
from, kdesvn-build will use the send-to address as the send-from address.

svn path=/trunk/KDE/kdesdk/doc/scripts/kdesvn-build/; revision=438049