Update READMEs from HT to OWPHT, add canonical information

[jarq6c]

Updates the rest of the READMEs to refer to OWPHydroTools instead of HydroTools. Documents the canonical format. Closes #65 Hard links the new banner for the hydrotools metapackage.

Additions

• None

Removals

• None

Changes

• List above.

Testing

1. Passed

Notes

• None

Todos

• None

Checklist

• [x] PR has an informative and human-readable title
• [x] PR is well outlined and documented. See #12 for an example
• [x] Changes are limited to a single goal (no scope creep)
• [x] Code can be automatically merged (no conflicts)
• [x] Code follows project standards (see CONTRIBUTING.md)
• [x] Passes all existing automated tests
• [x] Any change in functionality is tested
• [x] New functions are documented (with a description, list of inputs, and expected output) using numpy docstring formatting
• [x] Placeholder code is flagged / future todos are captured in comments
• [ ] Reviewers requested with the Reviewers tool :arrow_right:

[jarq6c]

Passed all tests.