Subject: [PATCH] Adding lws_config.h to list of installed headers.

The lws_config.h is generated based on configuration
options for the build process. In order to write
applications which compile code depending of the
presence of a feature (like the test-server does)
this header file needs to be installed.

Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Subject: [PATCH] Add appveyor CI support for Windows.
Subject: [PATCH] cmake: set the project language

By default, CMake sets C and C++ as languages used by the project.
This makes the configuration failed if no C++ compiler is found.

Since libwesockets in written in pure C, no C++, there is no reason to
disable it when the toolchain has no C++ support.

This patch just make the CMake code reflecting the real status of the
project with regard to the languages used.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>