Added a link to the Docgen wiki in the About module

Signed-off-by: Stéphane Mons <st.mons.lists@free.fr>
Added a link to the Docgen wiki into the About module

Signed-off-by: Stéphane Mons <st.mons.lists@free.fr>
Merge pull request #45 from Smons/master

Added a link to the Docgen wiki in the About module