ENH: Enhanced FindITK supporting use of ITK from an install tree or a build tree.  Only one cache entry is brought into user's project, called "ITK_DIR".  This is the location of an ITKConfig.cmake file from which other settings are loaded.

In certain cases, try to guess the source directory, so that you can run cmake or ccmake without specifying source dir

ENH: Added generation of --gccxml-compiler argument to GCC-XML for msvc6, msvc7, and nmake makefiles generators.