- remove unecessary stuff from validator_common.py
 - rename ambiguous variable names (like filter)
 - remove whitespaces at end of lines
 - replace tabs by spaces (grep "`echo -e '\011'`" *)
 - add small test suite
 - add setup.py
 - merge ft2hdf.py, print_hdf_in_step.py, printhdf.py
 - convert options.py into flowy.conf
 - add command line options to flowy.py allowing to override config