We don't have to wait for backlog to be inserted before adding
pending messages anymore since backlog are prepended in the view.

https://bugzilla.gnome.org/show_bug.cgi?id=662672

EmpathyRosterGroup is no longer a GtkExpander subclass but a GtkListBoxRow
one.

https://bugzilla.gnome.org/show_bug.cgi?id=712566

It has been replaced by empathy_ensure_individual_from_tp_contact(),
which can’t cause internal state corruption in libfolks by wrapping an
existing Persona in a second Individual when it’s already wrapped in
one.

This has also been fixed in libfolks.

See: https://bugzilla.redhat.com/show_bug.cgi?id=1031252

https://bugzilla.gnome.org/show_bug.cgi?id=712839

libsoup was escaping '_' and '.' in the challenge response but the
facebook server is not expecting that.

https://bugzilla.gnome.org/show_bug.cgi?id=707747

In PEP-8 we trust.

Makes code much easier and fix a crash if the commit date includes a negative
timezone offset (like 'Mon Oct 14 13:13:03 2013 -0400').

See commit 039dc326208e02b687e93739434e27a867f4ffa7.

https://bugzilla.gnome.org/show_bug.cgi?id=710453

libgee’s GeeIterator returns a new reference from most of its methods,
especially gee_iterable_iterator() and gee_iterator_get(). Add corresponding
g_object_unref() calls.

https://bugzilla.gnome.org/show_bug.cgi?id=710453