Fix a minor nit
Beginning to librarify commonly-reused functions (since I plan on making more tree-drawing scripts, I am starting with those)
Add tree function unit tests to the repo
Standardize functions for prettifying tree (adjustment of the makeArrowDiagram script incomplete, for db_displayTree is complete) and for standardizing leaf order for equivalent trees
Continuing librarifying...
Cleaning up more of the tree-related scripts and consolidating into libraries