* root element id from Settings, respect element size
* Plumb assets root via settings
* adapt crates to new wasm api
* more FileLoader cleanup
* use tsc bin from node_modules
* avoid spurious unlink errors
GNU Make considers the src/*/wasm_pkg targets as intermediate build
files and attempted to `rm` them. We can stop that my marking them as
`.PRECIOUS`
https://www.gnu.org/software/make/manual/html_node/Special-Targets.html
* `open` doesn't work on Linux
We could do something with xdg-open, but meh, not worth having platform
dependent logic for this.
* fix typo, clarify instructions
* make server compatible with older python install on linux
* revert change - we dont want to include music on web
the leading "-" means exclude a subdir of an included dir.
* better wrap of comments
* fix misfire in copy/pasted comment
* update docs
