This should prevent some application servers from continuously spamming the
logs in the event that TOUCHFILE can't be found.

Sometimes the mtn syncs hang until aborted. Well, my syncing with welterde and
echelon would hang periodically until I added the same timeout support I'm
adding here. In short, if Montone's action has not completed within 20 minutes,
forcably kill the process. /usr/bin/timeout is a part of coreutils so most
(all?) Linux distributions should have it but I don't require timeout to exist.
If "timeout" can be found, it'll be used.

Also, set site-updater.sh to change to the directory in which the script is
located. This way one can give an absolute path in a cronjob.

Both of these changes should be low risk.

To use Apache mod_wsgi, change $TOUCHFILE to point to the WSGI
file, and set "WSGIScriptReloading On" in the Apache config.

- no unneccesary uses of cat
- create tempfile with mktemp and cleanup with a trap
- simplify regex