bin/pima_auto.py: Change output directory for

splitted FITS-files to $HOME/pima_auto_split
pypima/pima.py: Add experiment name and band

information to the 'ExperInfo' class.
pypima/raexperiment.py: Make 'DB' class experiment

independent.
Move 'DB' class to separate file.
pypima/raexperiment.py: Now provide db connection

as argument.
pypima/raexperiment.py: Use new DB interface.
pypima/db.py: Fix
bin/pima_auto.py: Use new DB interface
Use ThreadPool instead of multiprocessing Pool for

background FITS files downloading.
bin/pima_auto.py: Clean up unused modules.
Add timestamps to info messages.
bin/pima_auto.py: Use one thread for background

data loading instead of pool of threads.
bin/pima_auto.py: Fix
pypima/db.py
pypima/raexperiment.py: Continue fringe fitting

even if bandpass calibration was failed.