Added virtual bytes pipe for mempool graph.

Added decimals to mempool graph y-axis.
fixes #14
fixes #12

frontend/src/app/shared/shared.module.ts

@@ -3,6 +3,7 @@ import { CommonModule } from '@angular/common';
 import { NgbButtonsModule, NgbModalModule } from '@ng-bootstrap/ng-bootstrap';
 
 import { BytesPipe } from './pipes/bytes-pipe/bytes.pipe';
+import { VbytesPipe } from './pipes/bytes-pipe/vbytes.pipe';
 import { RoundPipe } from './pipes/math-round-pipe/math-round.pipe';
 import { CeilPipe } from './pipes/math-ceil/math-ceil.pipe';
 import { ChartistComponent } from '../statistics/chartist.component';
@@ -18,17 +19,20 @@ import { ChartistComponent } from '../statistics/chartist.component';
     RoundPipe,
     CeilPipe,
     BytesPipe,
+    VbytesPipe,
   ],
   exports: [
     RoundPipe,
     CeilPipe,
     BytesPipe,
+    VbytesPipe,
     NgbButtonsModule,
     NgbModalModule,
     ChartistComponent,
   ],
   providers: [
-    BytesPipe
+    BytesPipe,
+    VbytesPipe,
   ]
 })
 export class SharedModule { }