Adds valadoc documentation for the publishing interfaces.
Adds valadoc documentation for the publishing interfaces.


h4ck3rm1k3/shotwell,abrauchli/shotwell,jof/shotwell,polymeris/shotwell,jimbonator/shotwell,polymeris/shotwell,jof/shotwell,damianmoore/shotwell,Sanva/shotwell-gsoc,h4ck3rm1k3/shotwell,jimbonator/shotwell,abrauchli/shotwell,Sanva/shotwell-gsoc,abrauchli/shotwell,jof/shotwell,damianmoore/shotwell,damianmoore/shotwell,polymeris/shotwell,ritchiewilson/shotwell,ritchiewilson/shotwell,jimbonator/shotwell,ritchiewilson/shotwell,Sanva/shotwell-gsoc,h4ck3rm1k3/shotwell