feat: add app shell (angular-material)

Add app shell built using angular-material and flex-layout. Refractor
code due to configuration changes.

Fixes #52

src/app/shared/loader/loader.component.html

@@ -1,4 +1,5 @@
-<div [hidden]="!isLoading" class="text-xs-center">
-  <i class="fas fa-cog fa-spin fa-3x"></i> <span>{{message}}</span>
+<!-- TODO: Loading Component -->
+<div [hidden]="!isLoading">
+  <span>{{message}}</span>
 </div>
 

src/app/shared/loader/loader.component.scss

@@ -1,3 +0,0 @@
-.fa {
-  vertical-align: middle;
-}

src/app/shared/loader/loader.component.ts

@@ -1,7 +1,7 @@
 import { Component, OnInit, Input } from '@angular/core';
 
 @Component({
-  selector: 'app-loader',
+  selector: 'mifosx-loader',
   templateUrl: './loader.component.html',
   styleUrls: ['./loader.component.scss']
 })