volume: add get_min_max function

See merge request !119

rename 'jp2k' to 'jp2'

See merge request !115

This reverts commit 5a9d081e.

This reverts commit d9cd8bc0.

'fix_normalization': cherry-pick from master to 1.0

See merge request !112

fix normalization

See merge request !109

(cherry picked from commit 62acacb3)

6588ea48 fix normalization

if an url is provided: use this url
else use self.data
else use data_url

tiffile: use browse_slice to read the data. As we expect several serie of one slice this make reuse existing code

* of volume.data if exists.
* else of the url (data_url if None provided)

limitation: HDF5 VirtualLayout is not handled.

warning: modify behavior regarding multitiff. Mow each serie is a 2D frame when it was 3D frames previously

# Conflicts:
#	tomoscan/volumebase.py

Merge branch 'updata_docker_image' into 'master'

See merge request !111

Update docker image

See merge request !110

(cherry picked from commit da6667bd)

d87bbcb3 update docker image

scanbase: fix format_data_path and format_file_path

See merge request !106

API improvements

See merge request !102