Fixed serializing material attribute values with spaces
Fixed serializing material attribute values with spaces

ehsan/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre,ehsan/ogre,bhlzlx/ogre,bhlzlx/ogre,bhlzlx/ogre,ruleless/ogre,ehsan/ogre,bhlzlx/ogre,ruleless/ogre,ehsan/ogre,ehsan/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre