Move signin to use AJAX. Render all flask templates with the common header. Move the header to a partial. Add account recovery.

static/js/app.js

@@ -136,6 +136,7 @@ quayApp = angular.module('quay', ['restangular', 'angularMoment', 'angulartics',
       when('/user/', {title: 'User Admin', templateUrl: '/static/partials/user-admin.html', controller: UserAdminCtrl}).
       when('/guide/', {title: 'Getting Started Guide', templateUrl: '/static/partials/guide.html', controller: GuideCtrl}).
       when('/plans/', {title: 'Plans and Pricing', templateUrl: '/static/partials/plans.html', controller: PlansCtrl}).
+      when('/signin/', {title: 'Signin', templateUrl: '/static/partials/signin.html', controller: SigninCtrl}).
       when('/', {title: 'Hosted Private Docker Registry', templateUrl: '/static/partials/landing.html', controller: LandingCtrl}).
       otherwise({redirectTo: '/'});
   }]).