use JsonWriter to generate JSON queries
use JsonWriter to generate JSON queries

Signed-off-by: Sven Strickroth <a88b7dcd1a9e3e17770bbaa6d7515b31a2d7e85d@cs-ware.de>

csware/GurtleReloaded,csware/GurtleReloaded,csware/GurtleReloaded