Overview of changes from GLib 2.37.2 to 2.37.3
==============================================

* add a new API for instance private data: G_DEFINE_TYPE_WITH_PRIVATE

* fix timestamps in tarball to prevent automake from being required to
  build the unmodified source

* add new D-Bus API for async property handling

* add back fsync() on ext4 for g_file_set_contents() after it was
  discovered that despite statements in the ext4 documentation
  suggesting that this is safe, it is not safe.

* Translations:
 Italian
 Norwegian bokmål

* Bugs fixed:
 698375 - D-Bus async properties
 700350 - timestamp issue
 701560 - fsync issue (fixed again)
 700035 - new API for instance private data

