added pdf parser that got missing, fixes #106
added pdf parser that got missing, fixes #106

tschmorleiz/amcat,amcat/amcat,amcat/amcat,amcat/amcat,amcat/amcat,tschmorleiz/amcat,tschmorleiz/amcat,amcat/amcat,amcat/amcat,tschmorleiz/amcat,tschmorleiz/amcat