Make WindowManager a friend of Window; implement set_delegate to add handle to wm to delegate
Compiler primitives.cc as part of libpane
Clean up exceptions; add a getter to OverlappingWindowException
Add (back) the 4 int constructor for Rect
Add test_directories to SConstruct
Add some primitive conversion methods and drawing methods
Add test1
Add SConscript for test directory
Ignore test1