DOC: remove deprecated paramter
Merge pull request #889 from sciunto/tuto

DOC: remove deprecated parameter
Add string inputs for range parameters of `rescale_intensity`
Remove six copy in _shared as it is a required dependency
Merge pull request #896 from ahojnnes/shared-six

Remove six copy in _shared as it is a required dependency
Add tests for uint12 and uint14 limits
Merge pull request #897 from tonysyu/named-rescale_intensity-params

Add string inputs for range parameters of `rescale_intensity`

This supports common ranges for scientific cameras: 10, 12, and 14-bit uint.