added png files to ignore list
poster structur slightly changed
added .directory
added stem = True option in make.words functions, uses tm:::stemDocument
Umstellung füer Poster Erstellung
Fixed broken groupvar attribute because of the new stemming option
stemming done
Option drop.size now works
Angefangen mit Anpassungen für das Poster
Added a translate function with the help of leo (problematic, 503 Service error)