Asana tasks!

See https://app.asana.com/0/11724913287040/14477880045173

- improve README.md https://app.asana.com/0/11724913287040/14477880045175
- use `@label@` to label shortcuts, objects and other things in `graph_objs_meta.py` https://app.asana.com/0/11724913287040/14477880045183
- table of content resides `graph_objs_meta-toc.py`

- and more (see commits)
hmmmm, should we be documenting this? the only reason I could see having this in here is for the /reference page. But, couldn't we say something like "colorscale used to be 'scl'" in older versions... Then, (1) we can just include logic to switch "scl" to "colorscale"? and (2) we could put a depreciation warning in the same spot. Thoughts?