Kiviat-HDR options

Types of changes

What types of changes does your code introduce? Check all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue),
• New feature (non-breaking change which adds functionality),
• Breaking change (fix or feature that would cause existing functionality to change),
• Documentation.

All following must be checked:

• I have checked there is no similar merge request on the track,
• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

Description

Allow other stacking schemes. Some fixes with HDR.

Can now stack either by QoI, HDR or a variable. Color mapping can also be chosen based on QoI or HDR. With HDR, the probability value is taken.

Closes #128 (closed)