Added release notes for v1.4.3.

Author: seidewitz

org.modeldriven.fuml/doc/release-notes/fuml-1.4.3.md

@@ -0,0 +1,29 @@
+### fUML Reference Implementation
+### v1.4.3 Release Notes
+
+This is a production release of the fUML Reference Implementation, tracking the issue resolutions approved in Ballot #3 of 
+the fUML 1.5 Revision Task Force (RTF).
+
+### fUML Execution Engine
+
+The current base release of the fUML Execution Engine is v1.4.0 (see the [v1.4.0 Release Notes](./fuml-1.4.0.md)), 
+conforming to v1.4 of the [fUML Specification](http://www.omg.org/spec/FUML/1.4).
+The v1.4.3 tracking release includes implementation of resolutions to the following OMG issues, which have
+been approved by the fUML Revision Task Force for fUML 1.5 but have not yet been formally adopted.
+
+The full list of open fUML issues is available at http://issues.omg.org/issues/task-force/FUML15.
+
+[FUML 15-28](https://issues.omg.org/issues/task-force/FUML15#issue-44986) fUML should allow association ends that are not association owned
+
+### XMI Loader/Infrastructure
+
+This tracking release also resolves the following issues related to the XMI Loader and other Reference Implementation infrastructure capabilities, 
+as tracked in our issue management system on GitHub (see https://github.com/ModelDriven/fUML-Reference-Implementation/issues).
+
+#### Bug Fixes
+
+[Issue #34](https://github.com/ModelDriven/fUML-Reference-Implementation/issues/34) Simple model not getting executed as expected
+
+#### Improvements
+
+None