2.45.80 (unstable):

Gio:
* Application: Add bind/unbind_busy_property() and set_state_hint().
  (Murray Cumming)
* TlsClientConnection: Add copy_session_state().
  (Murray Cumming)

Build:
* MSVC Builds: Require MSVC.Net 2013 for C++11 support.
  (Chun-wei Fan) Bug #753271.
* MSVC Builds: Adapt for recent source code changes.
  (Chun-wei Fan) Bug #753271.
* MSVC Builds: Improve Build Speed and Debugging Experience
  (Chun-wei Fan)