refractor: home module (#297)

* Refractor components.
* Redesign home component.
* Add comments.

Fixes #296

src/app/navigation/navigation.component.ts

@@ -1,5 +1,9 @@
+/** Angular Imports */
 import { Component, OnInit } from '@angular/core';
 
+/**
+ * Navigation component. (by office)
+ */
 @Component({
   selector: 'mifosx-navigation',
   templateUrl: './navigation.component.html',
@@ -7,8 +11,6 @@ import { Component, OnInit } from '@angular/core';
 })
 export class NavigationComponent implements OnInit {
 
-  currentJustify = 'start';
-
   constructor() { }
 
   ngOnInit() {