* DB_WRITE now called DB_MASTER, DB_READ now called DB_SLAVE
* Converted to use SQL wrapper functions instead of direct SQL in various places
* Experimental method for preserving the chronological order of events when slave servers are used. Untested.
* Fixes to the new post-parse existence test feature
* Some.. other stuff
* Put some option handling code in commandLine.inc which is untested and unused (for the moment).
* Converted all existing command line scripts to use the standard header and argument array.
* Did a quick test of compressOld.php, rebuildall.php and rebuildMessages.php to check for breakage.
* rebuildall.php was broken due to the unmaintained rebuildlinks.php, so I converted it to use refreshLinks instead. Required splitting into refreshLinks.inc and refreshLinks.php
