[libsigcplusplus] Created tag 2.99.7

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.99.7' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Mon Jun 27 09:10:43 2016 +0200

    2.99.7

Changes since the last tag '2.99.6':

Murray Cumming (12):
      signal_impl: Doesn't need to derive from notifiable.
      slot_rep: Pass a slot_rep*, not notifiable*, to destroy().
      signal_base: Do not derive from trackable.
      signal_base: Remove unnecessary trackable.h include.
      Docs: Fix invokation->invocation typos.
      Docs: Fix some minor typos.
      connection: Update the documentation.
      Added sigc::internal::weak_raw_ptr<>.
      connection: Use weak_raw_ptr for slot_base.
      slot_base: Use weak_raw_ptr instead of destroy_notify_struct.
      Remove trailing whitespace.
      2.99.7