removed ldmd2 dependency, doesn't work on the farm
moved Makefile to Makefile.mac. Link to gsl statically
fixed Makefile.mac after bad merge
added linux Makefile
m
made maximization step significantly faster
switched fully to std.parallelism
minor
deleted tolerance threshold in maximization routine
changed the way powell.d behaves when ITMAX is exceeded. Now it returns the best estimate and prints out a warning instead of throwing