DOC: add documentation
RF+DOC: update documentation and simplify implementation
SML+DTST: fix scope
DOC+DTST: provide examples
DOC+SML: typo
NF: xunit support
RF: use pretty URL printing
BF: properly report number of voxels with NaN or zero
BF+ACK: use orientation from read_nii. Thanks to #Reshanne Reader# for reporting an orientation flip
RF+BK: remove MEEG neighborhood support directly
RF: properly use progress reporting
DOC+SML: typo
TST: make a bit more lenient for the possible permutations
TST: do not show progress in unit test