MapServer 4.6 Beta 1

The first MapServer 4.6 beta is out, the first of several on our way to a final in June. 4.6 will be an important release for mapscript users, and we need beta testers. Please download and try it on one of your development platforms. Only one notable adjustment to my 4.6 targets: I won't be adding non-square pixel support to mapscript.