[glibmm] (6 commits) Non-fast-forward update to branch wip/dboles/ustring-sprintf

[Daniel Boles <dboles src gnome org>]

The branch 'wip/dboles/ustring-sprintf' 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:

  c1c5c4e... ustring: Add sprintf(), wrapping g_strdup_printf()

Commits added to the branch:

  7f69df8... MSVC_NMake: Change the ABI to glibmm-2.60 (*)
  6dc0a7a... Gio: Regenerate .defs and docs.xml files (*)
  3fbdaf0... Gio::Application: Add signal_name_lost() (*)
  cefc4a2... Gio::TlsConnection: Remove rehandshake API (*)
  b256e44... extraclassinit: Fix typo in comment in doc example (*)
  c297648... ustring: Add sprintf(), wrapping g_strdup_printf()

(*) This commit already existed in another branch; no separate mail sent