Progress: Continue working on completing the remove program.

Progress: Continue working on completing the remove program.

Fix a bug exposed by the directory unit tests where the `recurse.path_top` is not being defined and must be.
Add additional safety checks to fall back to a NULL string if `recurse.path_top` is NULL.

Add basic file and directory tests.
There are still a lot more tests to write.
This should be an acceptable start.

Refresh the stand alone build settings and config.h files.