updated TODO

TODO

+Checklist for FXRuby-1.6.20 release
+===================================
+
+ * Review bug list for any low-hanging fruit
+ * Complete and publish updates to the FXRuby User's Guide
+ * Update copyright notices in all source files
+ * Publish source gem
+ * Publish source tarball
+ * Publish binary gems for:
+   - Ruby 1.8.6 on mswin32
+   - Ruby 1.8.6/1.9.1 on MinGW
+   - Ruby 1.8.7 on Mac OS 10.6
+   - Ruby 1.8.6 on Mac OS 10.5
+ * Updated changes.html page
+ * Announcement on FOX and FXRuby mailing lists
+ * Publish news item on RubyForge
+ * Tag release in Git repository
+
+Other
+=====
  * What about the existing bug lists and such?
 
  * Review all docs to purge references to SourceForge.