add a changelog

CHANGELOG.md

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+# Itsy-Gitsy Changelog / News
+
+## v0.5.0 -- unreleased
+
+* MAJOR: remove 1-to-1 template mapping restriction (config format changed)
+* MAJOR: support parallel multi-thread/core execution
+* rename "repo_summary" template to "summary"
+* improve sanitization and verification of file paths
+* add "%NAME%" filename template, allowing "permalinks"
+* fix bugs in "limit_context" behavior
+* improve detection of when limits are exceeded (particularly repo size limits)
+* more "limit" settings that make multi-million commit repos parsable
+* add "fetch_remote" setting, to disable fetch on remote repos
+
+## v0.4.1 -- 2023-01-15
+
+* add a "dark" theme for default site
+* add sensible defaults to sample config
+* add more documentations, examples
+* change default main output names to "index.html"
+* fix missing tags in "alt_refs" template variable
+
+## v0.4.0 -- 2023-01-15
+
+* MAJOR: include default templates for a full site
+* MAJOR: add template type for individual files
+* improved handling of file paths
+* configurable branch names
+* configurable limits
+* repository "clone URL"
+* "clean" build option
+* "local" build option
+* ability to sort repo list by date
+* documentation
+
+## v0.3.0 -- 2023-01-12
+
+* MAJOR: paginated output for history, commits, and tags
+* default paths: `clones_repos/` and `rendered/`
+
+## v0.2.0 -- 2023-01-12 (first "release")
+
+* MAJOR: initial release, basic git repo templated output