v0.1.4

Added

• TilesRenderer.dispose function to completely dispose of all loaded geometry, materials, and textures in the scene when the renderer is no longer needed.
• TilesRenderer.onDisposeModel function which is called when a tile model is disposed of from the cache.

Fixed

• Case where the url protocol was converted to use a single slash instead of two when loading a model.
• Corner case where an error was thrown if the tileset was dragged off screen out of camera view.