refractor: self service module (#291)

* Refractor components.
* Improve responsiveness of components.
* Add task management component.
* Add users data resolver.
* Add relative router links.
* Replace mat-icons by font-awesome icons.
* Add comments.

Fixes #290

src/app/self-service/task-management/task-management.component.ts

@@ -0,0 +1,15 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'mifosx-task-management',
+  templateUrl: './task-management.component.html',
+  styleUrls: ['./task-management.component.scss']
+})
+export class TaskManagementComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}