Add string inputs for range parameters of `rescale_intensity`
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.
added blob_dog
doctest
added test_blob
doc string
typo
threshold
Changed formula, this improves detected size accuracy
Made get_local_maxima_3d public
It also takes connectivity as a paramater now
changed params and functionality of get_local_maxima
added get_local_maxima to feature
removed get_local_maxima, now using peak_local_max
rectified __all__
added names in CONTRIBUTIRS.txt
Merge pull request #903 from vighneshbirodkar/dog

Blob Detection (DoG)
Merge pull request #906 from ahojnnes/peak-fix

`peak_local_max`: fix docstring, add N-d tests
Fix ValueError: Buffer dtype mismatch, expected 'Py_ssize_t' but got 'long' on win-amd64