corrected typo in documentation
updated documentation (download section) + added sanity check in run_demo&.sh
corrected typos + added PB assignation
corrected assignation -> assignment
embedded the creation of PB logo in a Python script
wrote a demo script for multiple conformation analysis
added documentation for PB distribution (map)
added picture for map documentation
created PBcount.py and merged formed PBlogo.py and PBmap.py to PBstat.py