- version update to 0.9.13 [bsc#1173477]
## Overall changes:
* Small tweaks to the CMake build system.
* The macOS server example was overhauled and is now the most feature-complete sample
application of the project, ready for real-world use.
* Lots of documentation updates and markdownifying.
* The TravisCI continuous integration now also build-checks cross-compilation from
Linux to Windows.
* Setup a [Gitter community chat](https://gitter.im/LibVNC/libvncserver) for the project.
## LibVNCServer/LibVNCClient:
* Both LibVNCServer and LibVNCClient now support an additional platform, namely
Microsoft Windows. Building is supported with Visual Studio as well as MingGW.
* The separate crypto routines used by LibVNCClient and LibVNCServer were refactored
into an implementation common to both libraries.
* Several security issues got fixed.
* The bundled noVNC client is now at version 1.1.0 and included via a git submodule.
## LibVNCClient:
* Added connect timeout as well as read timeout support thanks to Tobias Junghans.
* Both TLS backends now do proper locking of network operations when multi-threaded
thanks to Gaurav Ujjwal.
* Fixed regression in Tight/Raw decoding introduced in 0.9.12 thanks to DRC.
* Fixed encrypted connections to AnonTLS servers when using the OpenSSL back-end.
Made possible by the profound research done by Gaurav Ujjwal.
## LibVNCServer:
* Added a hooking function (`clientFramebufferUpdateRequestHook`) to deliver
rfbFramebufferUpdateRequest messages from clients to the frame producer
thanks to Jae Hyun Yoo.
* Added SetDesktopSize/ExtendedDesktopSize support thanks to Floris Bos.
* Added multi-threading support for MS Windows.
* Fixed VNC repeater/proxy functionality that was broken in 0.9.12.