test
http://www.physionet.org/physiobank/database/mitdb/ http://www.physionet.org/physiotools/wpg/
[TODO: remember to align data with annotations if filtration will change signals' phase]
SciPy reference: http://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.savgol_filter.html
TODO: set key autotile column head zignoruje nam peirwsza linie obczaic jak plotowac dane z CSV ktory mamy (multi column)