Render externalDocs when it's available

src/main/coffeescript/view/MainView.coffee

@@ -21,7 +21,7 @@ class MainView extends Backbone.View
       else
         # Default validator
         @model.validatorUrl = "http://online.swagger.io/validator"
- 
+
   render: ->
     if @model.securityDefinitions
       for name of @model.securityDefinitions
@@ -61,10 +61,10 @@ class MainView extends Backbone.View
     # Render a resource and add it to resources li
     resource.id = resource.id.replace(/\s/g, '_')
     resourceView = new ResourceView({
-      model: resource, 
-      tagName: 'li', 
-      id: 'resource_' + resource.id, 
-      className: 'resource', 
+      model: resource,
+      tagName: 'li',
+      id: 'resource_' + resource.id,
+      className: 'resource',
       auths: auths,
       swaggerOptions: @options.swaggerOptions
     })

src/main/template/main.handlebars

@@ -2,6 +2,11 @@
   {{#if info}}
   <div class="info_title">{{info.title}}</div>
   <div class="info_description markdown">{{{info.description}}}</div>
+  {{#if externalDocs}}
+  <h5>More documentations</h5>
+  <p>{{externalDocs.description}}</p>
+  <a href="{{externalDocs.url}}" target="_blank">{{externalDocs.url}}</a>
+  {{/if}}
   {{#if info.termsOfServiceUrl}}<div class="info_tos"><a href="{{info.termsOfServiceUrl}}">Terms of service</a></div>{{/if}}
   {{#if info.contact.name}}<div class='info_name'>Created by {{info.contact.name}}</div>{{/if}}
   {{#if info.contact.url}}<div class='info_url'>See more at <a href="{{info.contact.url}}">{{info.contact.url}}</a></div>{{/if}}