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Scripting component

This component defines scripting support. Script is the only node defined here, it's like a black box that receives VRML/X3D events, processes them with some external language, and sends new VRML/X3D events.

Contents:

Demos
Supported nodes

1. Demos

For demos and tests of CastleScript, see the castle_script subdirectory inside our VRML/X3D demo models.

2. Supported nodes

Script(Pascal API: TScriptNode)
We handle special script protocols compiled: (to link scripts with handlers written in compiled language (ObjectPascal)) and castlescript: (simple scripting language specific to our engine).
TODO: no standard scripting language, like ECMAScript, is implemented now. directOutput field of script node is ignored (compiled: scripts have always direct access to whole VRML scene, castlescript: has never access to VRML nodes).
mustEvaluate is also ignored for now. This is non-optimal but valid behavior. Our current scripting protocols have no "loading" overhead (we don't initialize any scripting engine, castlescript: and compiled: scripts are just tightly built-in the engine) so this doesn't hurt us in practice.