debugged, now it is fully functional:

debugged, now it is fully functional:
- a lot of typos (especially priorities of operators in C and variable name
  mismatches)
- bit-format errors (forgotten additive constants or negations)
- do not use hash_rec[0]
- wrong entries in the collision link-lists must NOT appear in the beginning
  ==> saved time when verifying and solved some strange cases

- changed constants determining the maximum prolong-factor
- added a simple test-tool