[shotwell] (16 commits) Non-fast-forward update to branch wip/pluggable-auth

[Jens Georg <jensgeorg src gnome org>]

The branch 'wip/pluggable-auth' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  cc04b6f... Revert "Port to new SoupSession API"
  368f5bf... wip: Account interface
  e96799b... wip: Refactor authentication progress
  ee9ead3... wip: Hook up logout capability of authenticator
  d5c4000... Move authenticator in extra file
  c3612d2... wip: flickr: Extract authenticator
  0f86c07... flickr: Move API keys into authenticator
  3970167... flick: No need for request phase tokens in publisher
  79923bd... WIP
  96831a6... WIP
  3b40c81... wip: Extract Google authenticator
  87f0e0e... wip: flickr: Move persistency to authenticator
  1c9ef11... wip: Facebook: Move persitency into authenticator
  5190572... wip: Make pluggables depend on authenticator availability
  a73caf0... wip: google: Persistency handling in authenticator
  72ef7b4... wip: Flickr: Fix authentication from persistent data

Commits added to the branch:

  c4796c2... wip: Account interface
  89d238a... wip: Refactor authentication progress
  8dc5f39... wip: Hook up logout capability of authenticator
  b693930... Move authenticator in extra file
  6a2c7af... wip: flickr: Extract authenticator
  c733dad... flickr: Move API keys into authenticator
  bedf886... flick: No need for request phase tokens in publisher
  deb9f65... WIP
  98c36d4... WIP
  04ee3b1... wip: Extract Google authenticator
  3be5012... wip: flickr: Move persistency to authenticator
  c2d4e78... wip: Facebook: Move persitency into authenticator
  788a2e5... wip: Make pluggables depend on authenticator availability
  f2e9494... wip: google: Persistency handling in authenticator
  36ea830... wip: Flickr: Fix authentication from persistent data
  d2e21ab... wip: Only show logout button if authenticator supports it