Update README and CHANGELOG as markdown files

Author: ghickman

CHANGELOG.md

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+# Changelog
+
+## 2025.10.1
+- Resurrecting the project after ~12y of going stale
+- Move supported Python versions from 2.6&2.7 to 3.12+
+- Switch modern packaging techniques (pyproject.toml et al)
+- Add linter, auto-formatter, and static type checker
+- Consolidate CLI with renderers to give more powerful output options
+- Test various parts of the project in CI
+
+## v0.4.0
+- Add --version switch
+
+## v0.3.0
+- Output (paged) to the shell by default
+
+## v0.2.0
+- First usable release