Use web3Dd as codebase for app.html consistently

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35442 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
removed base64 from app

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35443 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e