sub read_mute_par

read parameter file
1. open file

2. set the counter

3. read contents of parameter file

4. odd-numbered lines contain tnmo and even contain vnmo
1. remove end of line
2. calculate number of useful elements
2. only leave the numbers

sub read_par

read parameter file
1. open file

2. set the counter

3. read contents of parameter file

4. odd-numbered lines contain time and even contain vnmo/xmute etc.
1. remove end of line
2. calculate number of useful elements
2. only leave the numbers

write_mute_par

write out a par file in the correct
format

write_cdp

Write out only the cdp nos.

cdp=g,h

for the first part of a file that contains more than one tnmo, vnmo pair.

write_gather

write out only the gather nos.

gather=g,h

for the first part of a file that contains
more than one tnmo, vnmo pair 

write_tmute_xmute

write out only 
tmute= a,b,c
xmute= A,B,C
tmute= d,e,f
xmute= D,E,F
 
for the second part of a file that contains
more than one tmute-xmute pair 

write_tnmo_vnmo

write out only 
tnmo= a,b,c
vnmo= A,B,C
rnmo= d,e,f
vnmo= D,E,F
 
for the second part of a file that contains
more than one tnmo-vnmo pair