changing test_pythononly.py to be able to run tests also from timing directory; it might be run using python/pypy test_pythononly.py  or with additional command-line argument to specify a type of testing: sanity or timing; it doesn't run all available tests - to run more test the dictionary Example_san/time has to me changed
adding a comment in tests/CMakeLists.txt (how to run without perf)
Merge branch 'master' of ssh://github.com/slayoo/mpdata