Merge branch 'master' into develop

.coverage

.gitignore

.idea/encodings.xml

.idea/misc.xml

.idea/modules.xml

.idea/navipy.iml

.idea/other.xml

.idea/vcs.xml

.idea/workspace.xml

README.md

doc/source/index.rst

doc/source/overview/brain.rst

doc/source/overview/comparing.rst

doc/source/overview/database.rst

doc/source/overview/examples/Cam_blender.svg

doc/source/overview/examples/Python_blender.svg

doc/source/overview/examples/apcv.py

doc/source/overview/examples/asv_brain.py

doc/source/overview/examples/contrast_weighted_nearness.py

doc/source/overview/examples/get_posorients.py