Turn off spellchecking of the username

* Safari is being picky plus usernames don't have to be grammatcially correct
* Turn off some others... not all are outside of Safari

Post OpenUserJS#1174

views/pages/loginPage.html

@@ -21,7 +21,7 @@ <h3>
  </noscript>
  <div class="input-group">
  <span class="input-group-addon"><i class="fa fa-user fa-fw"></i></span>
- <input class="form-control" type="text" name="username" value="{{wantname}}" placeholder="Username">
+ <input class="form-control" type="text" name="username" value="{{wantname}}" placeholder="Username" spellcheck="false" autocomplete="off" autocorrect="off" autocapitalize="off">
  <select name="auth" class="form-control">
  {{#strategies}}
  <option value="{{strat}}" {{#selected}}selected="selected"{{/selected}}>{{display}}</option>