New Feature: Plotting GBT phase scan results

[bdorney]

Description

Added new tools for visualizing GBT phase scan results.

Please see script or function documentation for details and calling examples.

Types of changes

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

Motivation and Context

Needed some way of displaying phase scan results graphically.

How Has This Been Tested?

Reviewing QC7 data, see for example screen shot below.

Screenshots (if appropriate):

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.