message: fix logo route forcing hard refresh of app
diff: <!-- Top menu -->
  <nav [ngClass]="isAtHome()" class="nav-bar" navScroll>
  <div class="nav-wrapper">
  - <a href="" class="brand-logo"><img src="../app/images/logo-transparent.png" height="60" width="380"></a>
  + <a routerLink="/" class="brand-logo"><img src="../app/images/logo-transparent.png" height="60" width="380"></a>
  <ul class="right hide-on-med-and-down">
  <li><a routerLink="/project/list" routerLinkActive="active" >Opportunities</a></li>
  <li><a routerLink="/user/list" routerLinkActive="active" >Volunteers</a></li>
  