=======================
 gmx2nmr.awk 
=======================
#!/usr/bin/gawk -f
#
#@  opposite of nmr2gmx.awk
#@  convert gmx topology distance and orientation restraints 
#
#
#to run do one of: 
# gawk -f gmx2nmr.awk args files......
# gawk -f `which gmx2nmr.awk` args files......
# gmx2nmr.awk args files..... 
# gmx2nmr.awk args files..... 
#
#
#
# -v resoffset=i [default=0]   
#                 offset to match residue number in nmr data file and 
#                 gromacs topology 
#                 nmr-res-nr = gmx-res-nr + resoffset  
#              SO:  resoffset is (pdb) res number at which gmx structure starts -1
#