Support direct access to serializer streams, so serializers can be
nested.
Make component script "this.template" read-only.
Stop globally-subscribed component scripts receiving messages posted to
local components, to reduce out-of-sync risks.
Move pathfinder data out of entity template directory.
Fix GuiInterface deserialization.
This was SVN commit r8865.
Made chat and ESC hotkey interact better with the dialog
Made command icons reference individual icons rather than sheets
Removed menu object cache
This was SVN commit r8715.
