Proposing libgdata external dependency version bump

[Richard Schwarting <aquarichy gmail com>]

Hello.

This is my first time proposing a dependency bump, so I apologise for whatever is lacking.

I am proposing a version bump for GNOME's external dependency on libgdata from 0.3 to the newly released 0.6.0.  Eye of GNOME 2.29.90 added a plugin, Postasa, for uploading images to Google's PicasaWeb photo sharing service as part of enhancement bug 600190 [1].  Postasa depends on libgdata 0.6.0 to access PicasaWeb.

I am the primary contributor for PicasaWeb support in libgdata, and the PicasaWeb support in libgdata is documented and well tested, striving to meet Philip Withnall's high standards.  I am also the author of the Postasa plugin, which was inspired by Lucas Rocha's Postr and which Felix Riemann has very kindly reviewed and added some testing.  I use EoG with Postasa regularly.

Sincerely, 
  Richard Schwarting

1. https://bugzilla.gnome.org/show_bug.cgi?id=600190