Timing (on embla) for calculation of the correlation 
funtction in the normal (to the local B-field) direction.
When number of procs are specified the correlation_OMP.f90
(with OpenMP) is used, otherwise correlation.f90 is used.

Run                  procs    time(corr)    time(corr+SF)        
----------------------------------------------------------
nohel2_64Pm=10b        -          6             
nohel2_64Pm=10b        1         14             20
nohel2_64Pm=10b        2          8             11
nohel2_64Pm=10b        4          4              6
			   
nohel2_128b            -        125 
nohel2_128b            1        217
nohel2_128b            2        118
nohel2_128b            4         64             83/212
nohel2_128b            8         35
nohel2_128b           16         27

nohel2_256e            -       2637
nohel2_256e            1       4533
nohel2_256e            4       1436
nohel2_256e            8       1138
nohel2_256e           16        358/1132
nohel2_256e           64        700/432


nohel1024a            64