[Source] meta node, key attribute

[Alan Hudson]

Doing some interop binary tests with the instant reality folks. They 
noticed that we drop meta nodes with a key attribute instead of a 
content attribute.  Is anyone using this field in this way?  HTML spec 
says its name and content with no attribute named key.

I can either just change the name of this field or I can duplicate it 
into content.  I think the best route is to just change it.  This is in 
X3DRetainedSAXExporter.printMetaData

-- 
Alan Hudson, Director 3D Tools
www.shapeways.com