Use random state to track random number generation
Add some docstrings
Allow setting chunksize=None to use pytables automatic chunk size
White space removal
Use random state hash in timestamps names and other fixes
Add method to get timestamps arrays
Use SHA1 hash instead of MD5
Rename sim_motion_em_chunk to sim_brownian_motion
Add verbose flag to sim_brownian_motion
Fix: use self.t_step instead of t_step