merge back cmake modifs from branch 0.3

cmake_targets/hss_build/CMakeLists.txt

cmake_targets/tools/MODULES/CMakeParseArguments.cmake

cmake_targets/tools/MODULES/CMakeUserFindMySQL.cmake

cmake_targets/tools/MODULES/CMakeUserUseBison.cmake

cmake_targets/tools/MODULES/CMakeUserUseFlex.cmake

cmake_targets/tools/MODULES/FindFreeDiameter.cmake

cmake_targets/tools/MODULES/FindGCCXML.cmake

cmake_targets/tools/MODULES/FindGcrypt.cmake

cmake_targets/tools/MODULES/FindGnuTLS.cmake

cmake_targets/tools/MODULES/FindKbuild.cmake

cmake_targets/tools/MODULES/FindLibXml2.cmake

cmake_targets/tools/MODULES/FindMySQL.cmake

cmake_targets/tools/MODULES/FindNettle.cmake

cmake_targets/tools/MODULES/FindPostgreSQL.cmake

cmake_targets/tools/MODULES/FindSCTP.cmake

cmake_targets/tools/MODULES/Kbuild.cmake

cmake_targets/tools/MODULES/cmake_useful.cmake

cmake_targets/tools/MODULES/kbuild_system.cmake

cmake_targets/tools/MODULES/kmodule.cmake

cmake_targets/tools/MODULES/path_prefixes.cmake