adding file

PACKAGING.md

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+# Packaging instructions
+
+## Linux
+
+### Debian/Ubuntu
+
+- Rename this directory to ms-ivy-X.Y where X.Y is the version number
+- Edit the files in debian/ to reflect the current version number
+- Run 'make builddeb'
+- The .deb file appears in the parent directory
+
+## Windows
+
+The following should work if updates to dependencies (including python
+itself) are not needed:
+
+- Install the latest existing release in C:\
+- Run these commands:
+
+    > c:\ivy\scripts\activate
+    > python setup.py install
+
+- Make an archive of c:/ivy such that the archive has a top-level directory 'ivy'.
+