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.
Add basic hold-fire stance, and use it for some test maps.
Add JSON data container to map XML files, to simplify the interaction
between scripts and maps.
Fix fixed-point printing so it roundtrips safely through map files.
Fix camera startup positions in old-format maps.
This was SVN commit r7844.