Add BciPy Report

[tab-cmd]

Overview

Add BciPy reporting functionality using reportlab. This PR implements extendable Report and ReportSection classes that can be used to generate a PDF report. Two report sections are tested,

• SignalReportSection (MNE ERP Plots used in offline analysis)
• SessionReportSection (Any Dict to be displayed in the report)

Ticket

https://www.pivotaltracker.com/story/show/185944301

Contributions

• report.py: Add Report, ReportSection, SignalReportSection, SessionReportSection.

Test

• make test-all
• Ran demo_visualization.py adding a breakpoint at the end. Importing the needed classes (from bcipy.helpers.report import Report, SignalReport, SessionReport) and running:

    report = Report('.')
    session = {'session': 1, 'date': '2021-10-01'}
    session_text = SessionReportSection(session)
    report.add(session_text)
    sr = SignalReportSection(figure_handles)
    report.add(sr)
    report.compile()
    report.save()

This will output the following:
BciPyReport.pdf

Documentation

• Are documentation updates required? In-line, README, or documentation? Yes.

Changelog

• Is the CHANGELOG.md updated with your detailed changes? done!

[lawhead]

Given that the _compile and _create_header methods are intended to be called by an external class (Report), should this still have a leading underscore?

[tab-cmd]

The intention is that it should not be called individually, but only on a final build. The create header is something that should only be called internally. I will remove the underscore to compile and add a note in the docstring.

[lawhead]

Naming is always hard. It would be more consistent to name this SignalReportSection, since it subclasses ReportSection rather than Report. Alternatively we could rename Report to ReportBuilder or something like that.