Realised that the openmp loop in runge_mod for commuting matrices was not
properly implemented - removed. Speeds have been improved by a factor of the
number of cores on the machine as the loop was performing the same calculation
on each core! Also removed openmp from default compilation in configure. Will
try to use BLAS mat-mat multiplication next instead.
	modified:   configure
	modified:   src/runge_mod.f90