changes to make to toy and grid production smarter

added the option --smartGrid which builds up a clever grid depending on the current exclusion limits, moved the whole tanb-grid to a new script, moved some helper functions to Utils.py

moved the tanb grid from submit.py to this new file, moved some helper functions from submit.py to utils.py

updated, saving also low exclusion limits in exclsuion out file used for --smartScan and --smartGrid

updated documentation