#216 added a new properties file that lists all etrs rahmenkarten with the coordinates of the respective centroid
#216 changed the error message if a wrong rahmenkartennummer is inserted, renamed the text of rahmenkarten label in the dialog
#216 the user can enter also etrs rahmenkarten numbers
#216 etrs89 rahmenkarten have 6 digits
#216 new products for feldvergleich with different map scales
#216 using an separate combo box for differntiating the map scale 1:500 and 1:1000 for feldvergleich products
#216 removed empty entry from maßstab combobox
#216 jalopy
Merge branch 'feature/216-alkis-datenausgabe-etrs-rahmenkarten' into dev