Added footer component.

- Added a footer component and added a instance of it in _layout.

src/routes/_layout.svelte

@@ -2,12 +2,12 @@
     import Nav from '../components/Nav.svelte';
     import userManager from '../components/userManager.svelte'
     import Modal from '../components/Modal.svelte'
+    import Footer from '../components/footer.svelte'
 
     export let segment;
 </script>
 
 <style>
-
     main {
         position: relative;
         max-width: 56em;
@@ -35,8 +35,9 @@
 
     </style>
 
-<Modal
+<Modal/>
 <Nav {segment} rightComponent={userManager}/>
 
 <slot></slot>
 
+<Footer/>