add CHANGELOG (Leeds-MONC#49)

CHANGELOG.md

@@ -0,0 +1,28 @@
+# Change Log
+
+## [Unreleased](https://github.com/Leeds-monc/monc/tree/HEAD)
+
+[Full Changelog](https://github.com/Leeds-monc/monc/compare/v0.9.0...HEAD)
+
+### New features
+
+- ARC4 compilation modifications and instructions (#28) by [Chris
+  Symonds](https://github.com/cemac-css)
+
+- Continuous integration testing with Travis (using simplified version of
+  Straka test case) (#9 and #10) by [Leif
+  Denby](https://github.com/leifdenby)
+
+
+### Bug fixes
+
+**Bugfixes**:
+
+- Fix for piecewise linear 1D interpolation (#35) by [Steven
+  Boeing](https://github.com/sjboeing)
+
+
+## [v0.9.0](https://github.com/Leeds-monc/monc/tree/v0.9.0) (2020-04-29)
+
+First tagged version representing fork from MOSRS repository at revision
+7765.