Update design_matrix.py
Merge pull request #324 from fabianp/patch-2

DOC: full list of HRF models accepted in make_dmtx
minor typos
do not execute non-executable, provide shebang for executable script
Merge remote-tracking branch 'upstream/master'
implement memory friendly fitting on the simplex in cython
general simplex fitting to non-Euclidean stabilizer
add partial volume C routines
implement PartialVolumeEstimation and FuzzyCMean classes
generalize PV estimation cython routines to multichannel data
remove lapack dependency from segmentation subpackage by passing function C pointer from scipy.linalg.flapack
fix edge effects in partial volume estimation
implement multichannel PV estimation model
Implement alternative stabilization prior in PV estimation
fix array size bug in segmentation module
fix bug in alpha matrix construction for ntissues > 3 in partial volume estimation