[Minor] Added DateSelection(DateRange)

li.strolch.model/src/main/java/li/strolch/model/query/DateSelection.java

@@ -30,6 +30,10 @@ public class DateSelection extends OrderSelection {
 		this.dateRange = new DateRange();
 	}
 
+	public DateSelection(DateRange dateRange) {
+		this.dateRange = dateRange;
+	}
+
 	public DateSelection from(Date from, boolean inclusive) {
 		this.dateRange.from(from, inclusive);
 		return this;