New CMake procedure.
** Here are the Git logs describing the change:
Renamed two flags to: SALOME_BUILD_TESTS and SALOME_BUILD_DOC
Versioning in root CMakeLists.txt
New prerequisite detection for: PThread, Python, HDF5, MPI and SWIG.
New prerequisite system for Sphinx, Doxygen, Graphviz, Boost.
Rewrote OmniORB find logic.
Rewrote LibBatch detection procedure.
Renaming functino to avoid name conflict with HDF5.
Fixed path detection for Graphiz and Doxygen. Added PTHREAD_LIBRARY where needed.
Removed SWIG warning: specifying lang in typemap is deprecated.
Rewrote FindCppUnit. Renamed flags.
Option WITHONLYLAUNCHER renamed to SALOME_LAUNCHER_ONLY. Not tested.
Added export logic.
