Update tabgen.c

[akscholar]

I apologize, this is the new updated version of the tabgen file. Thank you.

[teuben]

1. VERSION= should be the last keyword

2. the header= should have a nickname for the style of the header, as shown in table.5 manual page

[teuben]

don't forget to update the VERSION, should be 0.9 now, since we have a new keyword