inverted appointment order, implemented loading by date range

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.db/src/main/java/de/srsoftware/cal/db/MariaDB.java

@@ -168,7 +168,7 @@ public class MariaDB implements Database {
 			.leftJoin(AID, "appointment_tags", AID)
 			.leftJoin("tid", "tags", "tid")
 			.groupBy(AID)
-			.sort("start DESC");
+			.sort("start ASC");
 		if (from != null) query.where(START, moreThan(Timestamp.valueOf(from)));
 		if (till != null) query.where(END, lessThan(Timestamp.valueOf(till)));
 		if (count != null) query.limit(count);