Refactored .p3d loader to make it less strict about the tag, property and value strings when matching them to supported values.
Refactored .p3d loader to make it less strict about the tag, property and value strings when matching them to supported values.

Examples of supported matches are:

   <Slide> and <slide> will be treated the same
   <bgcolor>WHITE</bgcolor> and <bgcolor>White</bgcolor> will be treated the same
   <text alignment="TOP_LEFT"</text> and <text alignment="top left"</text>,  <text alignment="TopLeft"</text> will all be treated the same



scrawl/osg,marchelbling/osg,tomasthoresen/osg,jtorresfabra/osg,tomasthoresen/osg,openscenegraph/osg,artoolkit/osg,marchelbling/osg,jtorresfabra/osg,openscenegraph/osg,artoolkit/osg,scrawl/osg,tomasthoresen/osg,openscenegraph/osg,marchelbling/osg,jtorresfabra/osg,artoolkit/osg,scrawl/osg,marchelbling/osg,artoolkit/osg,jtorresfabra/osg,scrawl/osg,tomasthoresen/osg,openscenegraph/osg