0.7.0

New features and bug fixes.

• CHANGELOG for details
• documentation for how to use

Highlights

• Add py3.10 support (issue #101 )
• use mrcfile library for MRC/CCP4 file parsing and deprecate the old CCP4 code (#83, fixes #76 )
• improved docs for core.Grid (issue #69)

Full Changelog: 0.6.0...0.7.0