BUG: Fix the colormap for 3D plotting of activation maps.
BUG: Fix the colormap for 3D plotting of activation maps.

arokem/nipy,nipy/nireg,alexis-roche/register,nipy/nipy-labs,alexis-roche/nireg,bthirion/nipy,alexis-roche/nipy,alexis-roche/niseg,arokem/nipy,alexis-roche/nipy,arokem/nipy,arokem/nipy,alexis-roche/nipy,bthirion/nipy,alexis-roche/nipy,bthirion/nipy,alexis-roche/niseg,bthirion/nipy,alexis-roche/nireg,alexis-roche/register,alexis-roche/register,nipy/nipy-labs,nipy/nireg