[x3d-public] renewed development of X3D JSON support

[John Carlson]

Here are the validaton problems with the converted with the x3D JSON 
schema converted from X3D XML schema:

$ bash validate.sh 2>&1|grep Failed" "validation|wc

    3823   38270 2619431
$ bash validate.sh 2>&1|grep "Invalid regular expression"|wc

    3823   38270 2619431

3823 files fail validation with regexp errors.  Probably in the 
converted X3D JSON schema, would be my guess.