Make webservice registration layout nicer

solvable/src/webservice/templates/register.html

@@ -15,6 +15,7 @@
         <span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span>
         <input type="password" name="passwordconfirm" class="form-control" placeholder="Confirm password" required />
     </div>
+    <br>
     <input type="submit" class="btn btn-success" value="Register!" />
 </form>
 {% endblock %}