MenuBar.js: Show instructions if user starts Tundra without any scene. Closes #207. Clean up some deprecated function calls while at it.
MenuBar.js: Show instructions if user starts Tundra without any scene. Closes #207. Clean up some deprecated function calls while at it.

jesterKing/naali,jesterKing/naali,realXtend/tundra,jesterKing/naali,AlphaStaxLLC/tundra,BogusCurry/tundra,BogusCurry/tundra,pharos3d/tundra,pharos3d/tundra,jesterKing/naali,realXtend/tundra,pharos3d/tundra,pharos3d/tundra,realXtend/tundra,pharos3d/tundra,BogusCurry/tundra,AlphaStaxLLC/tundra,realXtend/tundra,jesterKing/naali,AlphaStaxLLC/tundra,BogusCurry/tundra,AlphaStaxLLC/tundra,BogusCurry/tundra,jesterKing/naali,realXtend/tundra,AlphaStaxLLC/tundra,realXtend/tundra,BogusCurry/tundra,pharos3d/tundra,AlphaStaxLLC/tundra,jesterKing/naali