2.31.0.1: (unstable)

* Avoid deprecation compiler warnings in glibmm and projects using glibmm.
  However, you will need to include either <glibmm.h> or <glibmm/thread.h>
  before other glibmm includes.
  (Murray Cumming)
* Move IOCondition from main.h to iochannel.h.
  (Murray Cumming)
* Don't include <glibmm.h> via init.h or wrap_init.h.
  (Murray Cumming)
* gmmproc:
  - Don't include C code examples found in the XML docs. Bug #650544
  - Don't include <glibmm.h> by default in generated files. Bug #662597
  (José Alburquerque)