Add cmake project files for cpp/ directory and all relevant subdirecctories

+ Add Makefiles generated by CMake JIC make is preferred
+ Update cmake version, header comments, and project descriptions

cpp/README.md

@@ -10,6 +10,9 @@ shaunrd0/klips/cpp/
 └── sdl-cmake   # Barebones sdl application written in C++ built with cmake
 ```
 
+This directory contains a `CMakeLists.txt`, which can be selected to open as a 
+project within your preferred IDE. From there, all nested examples can be built,
+debugged, and ran.
 
 In general, if a `CMakeLists.txt` is included in the project's root directory, 
 we can build the example with the following commands
@@ -19,7 +22,7 @@ mkdir build && cd build
 cmake .. && cmake --build .
 ```
 
-
 If cmake is not being used in a project, it can be built with `g++` manually using
 the commands outlined in `*/.vscode/tasks.json`, or by using VSCode to open the example
 and running the build task.
+