756.dat - Last man standing

[Steffen]

I tried to finally solve the 756.dat TODOs as follows:

- removed !HELP section from 756.dat as already 73590a.dat, 73590b.dat show how to do it
- updated 754.dat based on 756.dat
- updated 751.dat using the modified 754.dat and 756.dat

I sent 754.dat and 751.dat to Chris.
After that, I suggest to release 751.dat + 754.dat + 756.dat together


future improvements should
- BFC and geometry correct 752.dat
- BFC 73590a.dat and 73590b.dat