food seeds new food in a radius around its position instead of being placed randomly on the map

the config value food/seed_rate is now a float and describes the probability with which food seeds new food in a round
fixed stats entry in .gitignore and added emacs backup files
added new wesen source 'Rincewind'

for now it only moves around a circle until it dies

plans are to make it create a 'garden' for food supply and defend this garden
bug fixes in point.py
moving a wesen moves the wesen as far to the target position as possible with the remaining time
instead of just one field in x and y direction