Relocate gwt-site-webapp gwt client code to the new site repo

[dankurka]

Originally reported on Google Code with ID 8286

Modify build to build both the gwt client code and the markdown html files into a single
deployable artifact.

Reported by kerryrwilson on 2013-07-28 17:26:19

[dankurka]

Reported by julien.dramaix on 2014-04-09 12:29:53

• Labels added: Category-Website