Visual work. Added notebook and .py files

[schase15]

Description

This PR adds my work on the visualizations for the parent dashboard. It adds the score_visual notebook which includes the various mockups we presented to Graig and Darwin. It also adds the histogram.py and line_graph.py files which create the Plotly json files for web to display on the parental dashboard. All corresponding README's have been updated.

To be implemented in the visualization endpoint of our application.

Type of change

• 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 not work as expected)
• This change requires a documentation update

Change Status

• Complete, tested, ready to review and merge
• Complete, but not tested (may need new tests)
• Incomplete/work-in-progress, PR is for discussion/feedback

Has This Been Tested

• Yes
• No
• Not necessary

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• There are no merge conflicts

[lorischl-otter]

I appreciate the thorough documentation throughout these files. I left some PEP8 compliance notes, as well as a specific return for the event a child has 0 accepted submissions. Overall looks great though!

[lorischl-otter]

Just caught one small typo in the new return statement. Thanks for making the other changes!

[Jwilson1172]

oops I fixed a merge conflict in the notebooks/readme.md and now we have to resubmit the reviews, I was hoping that it would let me just merge with incoming changes