Linux makefile fixes for Scene3D
Rebuild Physics2D makefile
Fix clanGL using GL_BACK when the display is single buffered (when Layered windows is used)
Fix the Layered Window support for Win32 with clanGL
Display clanD3D support for Layered Windows in the examples, until they are repaired
Update the thread example colours
Port the Lobby example to ClanLib 3.0
Update the Calendar theme so that it displays something
Merge pull request #5 from authenticate/upstream

OSX Changes
Repair the Tests/Core/System test
Repair the Tests/Core/XPath test
Repair the Tests/Core/IOData tests