[X3D-Public] x3d schema and DOCTYPE corrections: Text node solid="false", GeoOrigin refactoring

[Don Brutzman]

==== Schema change ====

X3D schema update activity:

6 August 2010, brutzman
- Text node has default value solid="false" for two-sided visibility
- GeoOrigin allowed as ChildContentModelGeoSpatial for field, fieldValue,
     GeoLocation, GeoLOD validation, fixing previous change

17 March 2010, hudson brutzman
- GeoOrigin is X3DNode vice X3DChildNode, cannot appear as child of root Scene

==== DOCTYPEchange ====

same

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Also updated X3D Schema and DTD documentation.  Relevant lLinks:

http://www.web3d.org/specifications/contents.html
http://www.web3d.org/specifications/X3dDoctypeDocumentation3.2.html
http://www.web3d.org/specifications/X3dSchemaDocumentation3.2/x3d-3.2.html
http://www.web3d.org/specifications/x3d-dtd-changelog.txt
http://www.web3d.org/specifications/x3d-schema-changelog.txt

These and related links are maintained on the X3D Resources page:
http://www.web3d.org/x3d/content/examples/X3dResources.html#AuthoringSupport

As ever:  review, comments, questions and improvements are welcome.

all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br      brutzman at nps.edu
Watkins 270   MOVES Institute, Monterey CA 93943-5000 USA  +1.831.656.2149
X3D, virtual worlds, underwater robots     http://faculty.nps.edu/brutzman