New flexible toolbar setup example.

Closes #19

LGTM given by: @

Squashed commit of the following:

commit 21837f5a60a06bad8d368838360478bd0e27c9f8
Author: Matej Bukovinski <matej@bukovinski.com>
Date:   Fri Apr 11 17:53:38 2014 +0200

    Converted new sample into a PSCExample subclass.

commit d9780c7753595acb72ed7dbfb5a5ddaabc37f1f8
Author: Matej Bukovinski <matej@bukovinski.com>
Date:   Fri Apr 11 17:00:34 2014 +0200

    Removed explicit imports.

commit a931dcbacd1029ae04ca04057d4b25d485955729
Author: Matej Bukovinski <matej@bukovinski.com>
Date:   Fri Apr 11 17:00:08 2014 +0200

    Added new files to the catalog example.

commit 5420a93cf6bc9c27a704edcf34b6eab23d30e2c6
Author: Matej Bukovinski <matej@bukovinski.com>
Date:   Fri Apr 11 16:18:19 2014 +0200

    New flexible toolbar setup example added.