Issue #48: Add a CHANGELOG.md file to keep track of significant changes

Author: eharris369

CHANGELOG.md

@@ -0,0 +1,8 @@
+### 19.01 (latest)
+- Enhancements: [#24](https://github.com/microclimate-dev2ops/microclimate-eclipse-tools/issues/24)
+- Bug fixes: [#25](https://github.com/microclimate-dev2ops/microclimate-eclipse-tools/issues/25)
+
+### 18.12
+Initial release!
+
+#### Release builds are available [here](https://public.dhe.ibm.com/ibmdl/export/pub/software/microclimate/eclipse-tools/release/).