general update

Minor package enhancements and updating image segmentation.

Some particular changes:

• add overlap alpha in segm
• add shift of ray features via FFT
• swap images - cut images to min size
• minor refactor, rename pipeline parameter
• partial fixes - e.g. Ray feature vector
• add ipynb for RG and langer. islet
• simplify annot-segm statistic
• add constrains to GC regul.
• extend measured Ovary ray features
• move sub-package utils -> utilities
• rename tests to be detected by pytest
• update setup, MANIFEST.in, CircleCI, codecov
• fix sklearn due version changes
• fix classif. CrossValidations
• using logging.exception()