chore(logo): replace logo on front page, one which removes beta markings. Include more logo assets

Author: Eric Jimenez

public/resources/css/module/_hero.scss

@@ -127,7 +127,7 @@ $hero-padding: ($unit * 10) ($unit * 6) ($unit * 7);
 
     &:after {
       content: '';
-      background: url('/resources/images/logos/angular2/shield-with-beta.png') top center no-repeat;
+      background: url('/resources/images/logos/angular2/angular.svg') top center no-repeat;
       background-size: contain;
       position: absolute;
       left: 0;