Avoid Static Declaration of arrays (moved to shared or Global Memory)

CUDA/options/options.h

-#define MAXNFIBRES 4 
-#define MAXNPARAMS 16
-//MAXNFIBRES*3 + S0 + d + d_std + f0 = 16
-//rician only in runmcmc and doesn't use MAXNPARAMS
-#define MAXNDIR 640
-//640 gradient directions
 #define THREADS_BLOCK_MCMC 64
 #define THREADS_BLOCK_FIT 64
-#define MAXNDIRS_PER_THREAD 10 
-//MAXNDIR/THREADS_BLOCK_MCMC