Prepping for further development. Adding a release note for

a patch applied after 1.3.0 was released.

Author: pspeed42

build.gradle

@@ -14,7 +14,7 @@ buildscript {
 apply plugin: 'java'
 apply plugin: 'maven'
 
-version='1.3.0'
+version='1.3.1-SNAPSHOT'
 group='com.simsilica'
 
 ext.jmeVersion = "3.1.0-stable" 

release-notes.md

@@ -1,3 +1,7 @@
+Version 1.3.1 (unreleased)
+--------------
+* Fixed zone ID calculation for non-uniform grids.  See PR #2.
+
 Version 1.3.0 (latest)
 --------------
 * Fixed a bug where the newer state messages would fail if the game hadn't