Added color space conversion to image extraction

Merge pull request #15 from neuro-ml/dev

added to_color_space to stack images

Added `drop_duplicated_slices`

v0.2.1

released 0.2.1

Better handling of spatial information

v0.2.0

released v0.2.0

Unified interfaces for both dicom and csv files

v0.1.0

released version 0.1

Upgraded to pydicom==2.0

v0.0.3

updated version

Initial release

v0.0.1

fixed dependencies