Feature/fbms59

[MasahiroOgawa]

Objective

Run test for FBMS59 just one command. To do so, I refactor download script and test DAVIS script, to make repetitive part as a function.

Test

I tested running both;

python script/test_FBMS_raw.py
python script/test_DAVIS2016_raw.py

, and confirmed it's works well.