Improved quote detection and attribution

[afriedman412]

Description

• Pairwise, incremental quote detection looks for specific pairs of characters, no longer requires an even number of quotation marks to work.
• Attribution window expanded and adjusted to improve accuracy and prevent some false positives.
• Code added to prep/standardize text for quote detection

Motivation and Context

This is part of a larger project to create a package to combine quote detection and attribution with coreference resolution, which will be used for the analysis of several thousand newspaper articles.

How Has This Been Tested?

A/B testing with random samples of said articles, test creation after major changes.

(New tests added as well.)