* Ignore cmake intermediate build dir
* Fix C++ language version in cmake build scripts
* Set a default SDL2_ROOT_DIR value for macOS in cmake scripts
* Fixed macOS SDL framework linking in cmake scripts
* Added macos-cmake target for CI builds in github workflows
* Use C++17 for building Tests instead of 20, since we build them with VS2019 in some jobs
* Build with cmake in appveyor
* Install content files and tests binary to bin
* Install SDL2.dll on windows
* Build RecastDemo as GUI application on Windows and Mac OS
* Copy SDL2.dll to current binary dir