added a voxel coordinate randomizer for shuffling the order of voxels when computing th prfs
added a voxel coordinate randomizer for shuffling the order of voxels when computing the prfs
modified the execution file so as to do a voxel-wise prf computation on the sample data.  also removed all camel case form config
added a test for voxel_prf using the sample stimulus, response, and estimate numpy arrays downloaded via installation