Sync with WinSCP 5.1.3
Merge branch 'winscp513'

* winscp513:
  Sync with WinSCP 5.1.3
2012 --> 2013
Update WinSCP version info
ChangeLog: update
version info: update
Merge branch 'master' into far3

* master:
  version info: update
  ChangeLog: update
  Update WinSCP version info
  2012 --> 2013
  Sync with WinSCP 5.1.3