Flag to keep the examples building in enclosing projects.

Renaming.

Tidying/renaming/cleanup.

Add YT demo to Readme

Cmake files for the lib and examples; gitignore updated. Builds and runs in Clion.

MP build.

All four build modes work.

Builds in Release 32.

Point to new gtest.

Tests for Win32 only; relative dirs.

Renaming.

Upgraded to VS17.

Ignore this VS file.

Some tidying/renaming for clarity; fixed a cut-paste error in weapon-example.

Corrected Visual Studio directories to be more generic.