Version 1.2.1 (14 August 2008)
- add support for the libstdc++ parallel_mode (successor of MCSTL), new make targets: library_g++_pmode, tests_g++_pmode, clean_g++_pmode (requires g++ 4.3.2 or later)
- new stxxl file type stxxl::mem_file (for debugging purposes only), helps debugging with valgrind because no memory cell ever leaves valgrind's control
- properly destroy the singleton objects...