Multiprocessing test run
cleanup
Tests for slow functions
Added (currently failing) test to check the resulting traceback
Timeout tests, fixed a bug in execution (after one task blocks in pool, it isn't terminated)
Give traceback from actual execution
Touched docstrings
Settings management, timeout decorator
Merge pull request #11 from macobo/MultiProcessing

multiprocessing - allows to catch tests that are running too long.