date complaints: better config

[mwichmann]

In the apache logfile there's a complaint about date usage:

[Sat Jan 28 14:19:28 2012] [error] [client 127.0.0.1] PHP Warning: date(): It is not safe to rely on the system's timezone settings. You are required to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Denver' for 'MST/-7.0/no DST' instead in /var/www/html/Coordino/cake/libs/log/file_log.php on line 71

There is actually a setting for this, but it appears buried on line 248 of app/config/core.php long after one gives up the idea that this is a file that needs modification by someone intending to use Coordino... a heads-up somewhere would be helpful.