Changed gui editor to show off and test the new tab features.
Updated project files and makefile, have only tested vc8 and dev-cpp. Didn't know how to do the OSX project so I'll leave it for Dean.
Moved EGUI_ALIGNMENT into separate header.
Added getArea and getVolume for bounding boxes, no real reason for them.
git-svn-id: http://svn.code.sf.net/p/irrlicht/code/trunk@1124 dfc29bdd-3216-0410-991c-e03cc46cb475
Added a close event for windows (and in future other elements), absorbing this event will prevent the window from closing.
Used the new skin icon in the gui editor's resize button.
git-svn-id: http://svn.code.sf.net/p/irrlicht/code/trunk@879 dfc29bdd-3216-0410-991c-e03cc46cb475
