Modularize Analysis Steps

[pauladkisson]

Currently, in steps 4, 5, and 6 of the Guppy pipeline, the code used for analysis is coupled with GUI visualizations as well as file I/O. This tight coupling can cause various problems.

Step 4

• Organize code into modules by conceptual category (extract_timestamps, compute_z_score, etc.)
• Remove Redundant fns
• Disentangle read and write from analysis
• Give each module its own high-level fn that can be called by preprocess.py