Add AMD and version options to build.py

notes/2.13.md

@@ -35,3 +35,13 @@ Corresponding issue/pull requests:
 
 * https://github.com/openlayers/openlayers/pull/423
 
+# New Options for Build Script
+
+* add the contents of a file as a comment at the front of the build, for example, the output of 'git describe --tags' could be saved as a file and then included
+* create build file as an AMD module
+
+run 'build.py -h' for more details
+
+Corresponding issue/pull requests:
+
+* https://github.com/openlayers/openlayers/pull/528