Move & rename source/regex.h2 to include/cpp2regex.h2

In this project I'm trying to build *.h2 files in the same directory as the *.h they generate, and keep the same name

In /include, "cpp2util.h" is named that way because it really is the Cpp2 run-time library... For regex, we could name it regex.h(2) or cpp2regex.h(2)... the argument for using "cpp2" is because it really does include additional run-time support for what will now be one of the Cpp2-built-in metafunctions... anyway we can always revisit that in the future...

Author: hsutter

.gitignore

@@ -36,3 +36,4 @@ venv/*
 
 # VSCode workspace directory
 .vscode/
+buildh2.bat