#577, #580 start a history file

README.md

@@ -12,6 +12,7 @@ LGPL.txt                    | one proposed license model
 NXDL_VERSION                | the current NXDL version number
 README.txt                  | README file
 README.make.txt             | how to build the documentation
+release-history.md          | starting from v3.3
 applications/               | NXDL files for applications and instrument defs
 base_classes/               | NXDL files for components
 contributed_definitions/    | NXDL files from the community

release-history.md

@@ -0,0 +1,54 @@
+
+# Release History
+
+(starting from v3.3)
+
+## v3.3
+
+### Base Classes
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated
+
+### Application Definitions
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated
+
+### Contributed Definitions
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated
+
+### NXDL (XML) Schema
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated
+
+### Documentation
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated
+
+### Other
+
+#### new additions
+#### changes
+#### work-in-progress
+#### items removed
+#### items marked as deprecated