feat(accounting): add periodic accruals component (#274)

Add periodic accruals component to execute periodic accrual accounting
till a specified date.

src/app/accounting/periodic-accruals/periodic-accruals.component.ts

@@ -0,0 +1,43 @@
+import { Component, OnInit } from '@angular/core';
+import { FormGroup, FormBuilder, Validators } from '@angular/forms';
+import { Router } from '@angular/router';
+
+import { AccountingService } from '../accounting.service';
+
+@Component({
+  selector: 'mifosx-periodic-accruals',
+  templateUrl: './periodic-accruals.component.html',
+  styleUrls: ['./periodic-accruals.component.scss']
+})
+export class PeriodicAccrualsComponent implements OnInit {
+
+  minDate = new Date(2000, 0, 1);
+  maxDate = new Date();
+  periodicAccrualsForm: FormGroup;
+
+  constructor(private formBuilder: FormBuilder,
+              private accountingService: AccountingService,
+              private router: Router) { }
+
+  ngOnInit() {
+    this.createPeriodicAccrualsForm();
+  }
+
+  createPeriodicAccrualsForm() {
+    this.periodicAccrualsForm = this.formBuilder.group({
+      'tillDate': ['', Validators.required]
+    });
+  }
+
+  submit() {
+    const periodicAccruals = this.periodicAccrualsForm.value;
+    // TODO: Update once language and date settings are setup
+    periodicAccruals.locale = 'en';
+    periodicAccruals.dateFormat = 'dd MMMM yyyy';
+    periodicAccruals.tillDate = '06 August 2018';
+    this.accountingService.executePeriodicAccruals(periodicAccruals).subscribe(response => {
+      this.router.navigate(['/accounting']);
+    });
+  }
+
+}