[CMake] 2.6.4 RC 3

[Bill Hoffman]

Mostly to fix the issue with Visual Studio and header files that was
introduced with CMake 2.6.3, I am working on 2.6.4.   I have a release
candidate RC 3 that can be found here:

http://www.cmake.org/files/v2.6


Other changes in 2.6.4 are as follows:

Changes in CMake 2.6.4 RC 3
- Documentation fix for #8815
- Fix CDash only submit with ctest_submit
- various fixes for FindQt4.cmake
- cmake-gui block checkable flag for item during configure/generate.
- put qt version in about for cmake-gui

Changes in CMake 2.6.4 RC 2
- Fix issues in FindBoost #8576 #8734
- Fix -D issues with VS 6
- Fix scope issue with CMAKE_CURRENT_LIST_FILE  and macros
- Eclipse make VERBOSE off in makfiles #7585, and use built-in includes
- Codeblocks auto header finding
- Fix crash in include_directories #8704
- Some documentation fixes to commands and classes.
- Do not warn if LIBPATH is not set for nmake

Changes in CMake 2.6.4 RC 1
- Add some better documentation about RPATH variables
- No longer mark header files as HEADER_FILE_ONLY automatically,
   this gets rid of the ugly red marks in Visual Stuido
- Fix man-page preformatted text paragraphing
- Teach file(REMOVE) how to use relative paths
- Gracefully handle broken version symlinks
- Fix ASM source file extension default list
- Pass shared library export symbol in DEFINES
- Enforce unique binary directories
- Fix cmake-mode.el indentation cursor motion
- Simplify reverse cmLocalGenerator::Convert
- More robust decision to suppress implicit include dirs
- Fix Fortran implicit dependency include path (and test it)
- Clarify docs of old *_OUTPUT_PATH vars
- Fix svn update logic for modified files
- Add get_filename_component(... REALPATH)
- Work around broken GetLongPathName case


Thanks

-Bill