it now works based on test case files, which enable to quickly
generate test cases.

This is needed so that we can create simple testbenches which
will check the result of a test (a generated program) via a
simple strcmp.

I disabled a check below, because I can not find the cause of the
misalignment. The problem is that pToken structure has a different
member alignment inside the runtime library then inside of this
program. I checked compiler options, but could not find the cause.
Should anyone have any insight, I'd really appreciate if you drop me
a line.

..., restructured makefile, added some troubleshooting to test case
(program rscript-parse.c has problem due to different structure alignment,
where I do not yet know the reason)