Added the final missing Voids or Reprints report aslo.

Ready for beta 1.
Removed voucher.is_void in favour voucher_type == void

bookie/src/app/voids-reprints-report/voids-reprints-report.ts

@@ -0,0 +1,12 @@
+export class VoidsReprintsReportItem {
+  date: string;
+  billId: string;
+  amount: number;
+  settlement: string;
+}
+
+export class VoidsReprintsReport {
+  startDate: string;
+  finishDate: string;
+  amounts?: VoidsReprintsReportItem[];
+}