pep8 fix e225

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
e227 e228

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
colorconv from scikit image
Modify colorconv to use local dtype and numpy
Use local colorconv rather than scikit-image
Add scikit image license
Remove Lena examples
Merge pull request #3771 from thisch/pep8fix_e225_e227_e228

PEP8 : [examples] fix pep8 error classes e225, e227 and e228
Merge pull request #3737 from jenshnielsen/rgb2lab_minimal

Rgb2lab minimal