Add CHANGELOG.md (#125)

CHANGELOG.md

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+# Change log
+
+## 2022-06-17, Version 0.2.0
+### Commits
+- [[`fec9c650f2`](https://github.com/molpopgen/demes-rs/commit/fec9c650f2410f66cb2ba71d275a18bd798a3212)] rewrite main crate docs (#124) (Kevin R. Thornton)
+- [[`8eab302e80`](https://github.com/molpopgen/demes-rs/commit/8eab302e803f9ca04b96dd95b04b123e4b7a3213)] Add Graph::to_integer_generations (#123) (Kevin R. Thornton)
+- [[`f613234e8c`](https://github.com/molpopgen/demes-rs/commit/f613234e8c414d964c3d9f9a92dab3efa9af16ad)] Add Graph::to_generations() (#120) (Kevin R. Thornton)
+- [[`a1860410e4`](https://github.com/molpopgen/demes-rs/commit/a1860410e41c1461d7d11ed944a03084661eb6eb)] Document specification.rs (#119) (Kevin R. Thornton)
+- [[`4e4c762ea2`](https://github.com/molpopgen/demes-rs/commit/4e4c762ea22586d78b862ac11156759b2f46b70a)] document lib.rs (#118) (Kevin R. Thornton)
+- [[`381bdf14a9`](https://github.com/molpopgen/demes-rs/commit/381bdf14a91a97c6960f98504df8db5145e993f5)] Document builder.rs (#113) (Kevin R. Thornton)
+- [[`de22f5d9d7`](https://github.com/molpopgen/demes-rs/commit/de22f5d9d7018b24b9bad0f62fe304dda0e93eb3)] clean up commented-out code (#117) (Kevin R. Thornton)
+- [[`abaa835e91`](https://github.com/molpopgen/demes-rs/commit/abaa835e91c6fc7fbc40f59b683eb448fdb68584)] Remove unnecessary uses of TryFrom (#116) (Kevin R. Thornton)
+- [[`ca58cc4a61`](https://github.com/molpopgen/demes-rs/commit/ca58cc4a61929c886b117774f38cd61029874055)] All newtypes are now From<f64> instead of TryFrom. (#115) (Kevin R. Thornton)
+- [[`5d28bb1959`](https://github.com/molpopgen/demes-rs/commit/5d28bb1959edb1f911d9310e1d64092783d26ca7)] Document DemesError (#111) (Kevin R. Thornton)
+- [[`05240cddc1`](https://github.com/molpopgen/demes-rs/commit/05240cddc1b03b55fbbd81655faf49f14accfcf1)] Apply naming consitency to unresolved spec types. (#110) (Kevin R. Thornton)
+- [[`ad6b86b6fd`](https://github.com/molpopgen/demes-rs/commit/ad6b86b6fdd681cc076f65a6cb40b59fcb9ad96d)] Separate resolved/unresolved Pulse using newtypes. (#109) (Kevin R. Thornton)
+- [[`6a25123ff0`](https://github.com/molpopgen/demes-rs/commit/6a25123ff014940d10168bf2005976178827c597)] Define the public exports (#106) (Kevin R. Thornton)
+- [[`fea785c90a`](https://github.com/molpopgen/demes-rs/commit/fea785c90a9f23a0903d6aa8aaa96695d4b894eb)] newtypes may now be compared to f64 (#105) (Kevin R. Thornton)
+- [[`b6cf1157db`](https://github.com/molpopgen/demes-rs/commit/b6cf1157db2a9c6bad30e8377eaf065e88572466)] DemeData visibility changed to pub(crate). (#104) (Kevin R. Thornton)
+- [[`b70787efae`](https://github.com/molpopgen/demes-rs/commit/b70787efae6d70b982ebf15fd880954781146a91)] GraphBuilder::add_deme no longer returns Result. (#103) (Kevin R. Thornton)
+- [[`1003786d98`](https://github.com/molpopgen/demes-rs/commit/1003786d987b5906151968d07561554cdb32e065)] Add convenience constructor to GraphBuilder for time_units: generations (#102) (Kevin R. Thornton)
+- [[`cdcc26ce07`](https://github.com/molpopgen/demes-rs/commit/cdcc26ce07b2e2104f8cb6be974c16270ccbb170)] GraphBuilder::new now accepts generation time and top-level defaults. (#101) (Kevin R. Thornton)
+- [[`300be5a017`](https://github.com/molpopgen/demes-rs/commit/300be5a01757f80130cc39346f81a337670c7dd3)] Add GraphBuilder::add_pulse (#100) (Kevin R. Thornton)
+- [[`6e6b9892fc`](https://github.com/molpopgen/demes-rs/commit/6e6b9892fcbfa264c287b3a7a066c432223b8c7f)] Add GraphBuilder::add_migration (#99) (Kevin R. Thornton)
+- [[`8c03dcd8df`](https://github.com/molpopgen/demes-rs/commit/8c03dcd8df78f248a1c66a11fcf2990e5e146ca4)] Refactor Deme to reduce code duplication. (#98) (Kevin R. Thornton)
+- [[`69071efcbe`](https://github.com/molpopgen/demes-rs/commit/69071efcbe536d96e8a711d553c1edd535e8caf7)] Add functionality to add a Deme to a Builder. (#89) (Kevin R. Thornton)
+- [[`2d4c47b265`](https://github.com/molpopgen/demes-rs/commit/2d4c47b26542eed099de1acaa325e394771a2b7e)] Streamline internal code for serializing deme-level defaults. (#96) (molpopgen)
+- [[`1b0f5bebaf`](https://github.com/molpopgen/demes-rs/commit/1b0f5bebafcde11474aa7c0dbd246d2a3bafbabb)] Add fn to return crate version. (#92) (Kevin R. Thornton)
+- [[`9f137c2c03`](https://github.com/molpopgen/demes-rs/commit/9f137c2c03fdde426958c831c7a245002c6d2939)] Package version bump to 0.2.0 (molpopgen)
+- [[`fb8b3d2e90`](https://github.com/molpopgen/demes-rs/commit/fb8b3d2e904bd97a9e0e4e92fdc2b5968f1f2810)] Use SnakeCase formatting for enum fields (#91) (Kevin R. Thornton)
+- [[`19495067ac`](https://github.com/molpopgen/demes-rs/commit/19495067ac608a71db12600b9bd079a4904790f8)] Add minimal features to construct GraphBuilder. (#88) (Kevin R. Thornton)
+- [[`2db891fc2b`](https://github.com/molpopgen/demes-rs/commit/2db891fc2b31ce0b7552e3348eb7e50af9203e42)] Merge GenerationTimeError into GraphError (#87) (Kevin R. Thornton)
+- [[`8c0539e437`](https://github.com/molpopgen/demes-rs/commit/8c0539e437ea6b4c06b151a0c1309fd51d838e98)] rename ToplevelError to GraphError (#86) (Kevin R. Thornton)
+- [[`1405ce86fc`](https://github.com/molpopgen/demes-rs/commit/1405ce86fc11b03543ad80c772a60233093c9138)] fix typo in README. (Kevin R. Thornton)

README.md

@@ -35,3 +35,7 @@ cargo tarpaulin --tests --ignore-tests -o html
 ```
 
 Finally, open `tarpaulin-report.html` with your favorite browser.
+
+## Change log
+
+See [here](https://github.com/molpopgen/demes-rs/blob/main/CHANGELOG.md).