* log all caught exceptions using error_log()
* clean up create_game() error handling a bit to prevent a fatal
  error from being shown to the user when a game can't be loaded
* add logtail, postfix, and configuration for a cron job which tails
  the apache error log every night and mails the results to interested
parties (currently chaos)
* fix a couple of dependency logic omissions which might cause
  puppet to fail sometimes
Merge pull request #165 from cgolubi1/144-logerror

log all caught exceptions to apache log