Does this mean the .sh3d file will contain all files needed by the export to html javascripts for the canvas?

It's one of my goals at the end, but that requires to port to JavaScript the classes DAELoader, Max3DSLoader for DAE/3DS support, and Wall3D, Room3D,Ground3D and other model classes to manage the structure of a home. Porting these 5000 lines of code will require probably two weeks of work and will avoid to use the Export to HTML5 plug-in, but without adding any new feature to the end user.
I wonder if it wouldn't be better to be able to add and arrange furniture in the plan first. This second task requires more work but would bring some nice features in SweetHome3DJS...