gobject-introspection now emits many more warnings for malformed comments, and they fail the build. https://bugzilla.gnome.org/show_bug.cgi?id=673656
* Use a ClutterTextBuffer that allocates non-pageable memory to hold passwords for gnome-keyring, ssh, gpg * Requires gcr 3.3.5 https://bugzilla.gnome.org/show_bug.cgi?id=652460
* Add a keyring prompter based on GcrSystemPrompter * Adds dependency on gcr version 3.3.5 or higher * Not yet using unmerged support for non-pageable memory https://bugzilla.gnome.org/show_bug.cgi?id=652459
