chore(images): hide images that need update, add new ones

public/docs/dart/latest/guide/architecture.jade

@@ -13,8 +13,7 @@ include ../../../../_includes/_util-fns
   Angular takes over, presenting our application content in a browser and responding to user interactions
   according to the instructions we provided.
 
-figure
-  img(src="/resources/images/devguide/architecture/airplane.png" alt="Us" align="left" style="width:200px; margin-left:-40px;margin-right:10px" )
+<!-- figure img(src="/resources/images/devguide/architecture/airplane.png" alt="Us" align="left" style="width:200px; margin-left:-40px;margin-right:10px" ) -->
 :marked
   Of course there is more to it than this.
   We're cruising at high altitude in this overview.

public/docs/dart/latest/guide/index.jade

@@ -3,8 +3,7 @@ include ../../../../_includes/_util-fns
 :marked
   This Developers Guide is a practical guide to Angular for experienced programmers who
   are building client applications in HTML and Dart.
-figure
-  img(src="/resources/images/devguide/intro/people.png" alt="Us" align="left" style="width:200px; margin-left:-40px;margin-right:10px" )
+<!-- figure img(src="/resources/images/devguide/intro/people.png" alt="Us" align="left" style="width:200px; margin-left:-40px;margin-right:10px" ) -->
 :marked
   We are on a journey together to understand how Angular works and, more importantly,
   how to make it work for us. We look at our application requirements and we see problems to solve.

public/docs/ts/latest/guide/architecture.jade

@@ -125,7 +125,8 @@ figure
 <a id="component"></a>
 :marked
   ## The Component
-<!-- figure img(src="/resources/images/devguide/architecture/hero-component.png" alt="Component" align="left" style="width:200px; margin-left:-40px;margin-right:10px" ) -->
+figure
+  img(src="/resources/images/devguide/architecture/hero-component.png" alt="Component" align="left" style="width:200px; margin-left:-40px;margin-right:10px" )
 :marked
   A **Component** controls a patch of screen real estate that we could call a *view*. 
   The shell at the application root with navigation links, that list of heroes, the hero editor ... 
@@ -157,7 +158,8 @@ figure
 <a id="template"></a>
 :marked
   ## The Template
-<!-- figure img(src="/resources/images/devguide/architecture/template.png" alt="Template" align="left" style="width:200px; margin-left:-40px;margin-right:10px" ) -->
+figure
+  img(src="/resources/images/devguide/architecture/template.png" alt="Template" align="left" style="width:200px; margin-left:-40px;margin-right:10px" )
 :marked
   We define a Component's view with its companion **template**. A template is a form of HTML
   that tells Angular how to render the Component.