Tour fixes/improvements:

- Use a placeholder for the container id and repo name
- Add a skip button for docker login
- Add better messaging around permissions

static/directives/angular-tour-ui.html

@@ -22,6 +22,7 @@
 
     <div class="wait-message" ng-show="step.waitMessage">
       <div class="quay-spinner"></div> {{ step.waitMessage }}
+      <span class="skip-message" ng-show="step.skipTitle"><button class="btn btn-default" ng-click="next()">{{ step.skipTitle }}</button></span>
     </div>
   </div>
 </div>