adjust sign in page to stick to the top with margin of 20px
Merge branch 'master' of https://github.com/dst-hackathon/socialradar-web

gn In</paper-tab>
        <paper-tab on-click={{toggleSigninForm}}>Sign Up</paper-tab>
      </paper-tabs>

    <form id="signinForm" hidden?={{hiddenSigninForm}}>
      <paper-input type="email" label="E-mail Address" floatingLabel="true"></paper-input>
      <paper-input type="password" label="Password" floatingLabel="true"></paper-input>
      <paper-button raised="true" class="signinButton" role="button">Sign In</paper-button>
    </form>

    <form id="registerForm" hidden?={{hiddenRegisterForm}}>
      <paper-input type="email" label="E-mail Address" floatingLabel="true"></paper-input>
      <paper-input type="text" label="Username" floatingLabel="true"></paper-input>
      <paper-input type="password" label="Password" floatingLabel="true"></paper-input>
      <paper-input type="password" label="Confirmed Password" floatingLabel="true"></paper-input>
      <paper-button raised="true" class="registerButton" role="button">Register</paper-button>
    </form>erge branch 'master' of https://github.com/dst-hackathon/socialradar-web