Some general cleaning up in the menu's and the various controllers. Added a new class (yet to be tested) and removed most of the "piggy bank"-implementation in anticipation of the ideas from issue #6. Fixed a bug in the default user seeder.

app/views/categories/index.blade.php

@@ -10,6 +10,9 @@
             Use categories to group expenses by hobby, for certain types of groceries or what bills are for.
             Expenses grouped in categories do not have to reoccur every month or every week, like budgets.
         </p>
+        <p>
+            <a href="{{route('categories.create')}}" class="btn btn-success"><span class="glyphicon glyphicon-plus"></span> Create a new category</a>
+        </p>
     </div>
 </div>