[gnome-software] (3 commits) Non-fast-forward update to branch wip/hughsie/GsPluginEvent

[Richard Hughes <rhughes src gnome org>]

The branch 'wip/hughsie/GsPluginEvent' 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:

  8ab9f22... Allow plugins to report non-critical events up to the UI
  16b34b8... f
  90b10b0... f

Commits added to the branch:

  deed15c... trivial: Fix up a few gtk-doc mistakes
  a029567... trivial: Add gs_plugin_error_to_string()
  3eb4d3e... Allow plugins to report non-critical events up to the UI