message: Move signUp anchor up
diff: <h1 local-class="hero-brand">{{t 'home.brand'}}</h1>
  <h3 local-class="hero-tagline">{{t 'home.tagline'}}</h3>
  {{osf-logo animate=true}}
  + <div id="signUp" class="anchor"></div>
  <div id="hero-signup" class="container">
  <div class="row">
  <div class="col-sm-6 hidden-xs">
  </div>
  <div class="col-sm-6" local-class="sign-up-div">
  <h2>{{t 'home.signup_title'}}</h2>
  - <div id="signUp" class="anchor"></div>
  <div id="signUpScope">
  {{sign-up-form model=model didValidate=didValidate submit=(perform submit) hasSubmitted=hasSubmitted}}
  </div>
  