add failing test
fix colorbar bug
cosmit]
FIX : fix for #101
Merge pull request #93 from dengemann/fix_color_bar

BUG/WIP: positive only overlays + multiple hemis
FIX: PEP8
Merge pull request #104 from Eric89GXL/peps

FIX: PEP8
Update io.py

Typo
Update io.py
Merge pull request #105 from diego0020/patch-1

Fix project_volume_data docstring