Features and Summary Rewrite

This update contains a complete rewrite of the feature extraction and summary generation systems.

Summary of Changes

• Completely rewrite feature extraction
• Completely rewrite summary CSV generation

Feature Extraction Rewrite

This rewrite changes no observable aspects of feature generation but significantly improves maintainability and futureproofing.

Summary CSV Generation Rewrite

This rewrite has the same effects as the feature extraction rewrite, except it enabled a few new features. Namely, the new column selection UI in Palmreader which uses metadata from each summary column to build the UI. This change will also result in the summary CSV column order being altered.