Add missing ZeroClipbpard SWF file

Flash support for ZeroClipboard is not working in project pages since
the SWF file is missing. There was a typo in the .gitignore file that
ignored "*.sw?" files.

Remove links to forum.spring.io

.gitignore

@@ -3,6 +3,6 @@
 *~
 _site
 .idea
-*.sw?
+*.sw[op]
 .project
 sample-pages

_config.yml

@@ -22,9 +22,6 @@ project: spring-batch
 # Project github URL
 github_repo_url: https://github.com/spring-projects/spring-batch.git
 
-# Project forum URL
-forum: http://forum.spring.io/forum/spring-projects/batch
-
 # If you want to include a custom pom.xml or gradle template set these value to true and add _include files
 custom_pom_template: true
 custom_gradle_template: true

_includes/billboard.html

@@ -17,10 +17,12 @@
                             <a href="{{ site.github_repo_url }}" class="project-link">
                                 <i class="icon-github"></i>
                             </a>
+{% if site.forum %}
                             <a href="{{ site.forum }}" class="project-link project-link-forum">
                                 <div class="spring-icon spring-icon-forum">
                                 </div>
                             </a>
+{% endif %}
                         </div>
                     </div>
 

index.html

@@ -19,10 +19,6 @@ badges:
       url:  https://build.spring.io/browse/BATCH
       icon: ci
 
-    - name: Forum
-      url:  http://forum.spring.io/forum/spring-projects/batch
-      icon: forum
-
     - name: StackOverflow
       url:  http://stackoverflow.com/questions/tagged/spring-batch
       icon: stackoverflow