Update spark_i18n_de.properties (#292)
Update spark_i18n_de.properties (#292)

I've translated last strings, removed anglicisms, and added punctuation mark. SPARK-1867
vipinraj/Spark,igniterealtime/Spark,guusdk/Spark,speedy01/Spark,wrooot/Spark,BittyByte/Spark,BittyByte/Spark,igniterealtime/Spark,vipinraj/Spark,wrooot/Spark,speedy01/Spark,igniterealtime/Spark,guusdk/Spark,speedy01/Spark,vipinraj/Spark,speedy01/Spark,wrooot/Spark,wrooot/Spark,BittyByte/Spark,guusdk/Spark,igniterealtime/Spark,BittyByte/Spark,guusdk/Spark,vipinraj/Spark