Created troute pre/post log file and additional runtime output

[Short description explaining the high-level reason for the pull request]

Additions

Write key parameters, as actually processed by troute, to a separate log file - including, but not limited to:
++ MC network
++ Diffusive routing (if applicable) and network
++ Gages/data assimilation
++ Output of results
++ Key compute parameters

[ ] PR has an informative and human-readable title
[ ] Changes are limited to a single goal (no scope creep)
[ ] Code can be automatically merged (no conflicts)
[ ] Code follows project standards (link if applicable)
[ ] Passes all existing automated tests
[ ] Any change in functionality is tested
[ ] New functions are documented (with a description, list of inputs, and expected output)
[ ] Placeholder code is flagged / future todos are captured in comments
[ ] Visually tested in supported browsers and devices (see checklist below :point_down:)
[ ] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
[ ] Reviewers requested with the Reviewers tool :arrow_right: