@import
slight factoring
async parsing with load tracking
update tests
make style elements work
remove logging
allow dynamic loading to re-use the same loader.
factor out path and add scope stub.
simplify boot, wip.
support native imports (do nothing!)
some test fixup
factor out Loader.
start on observer, not integrated yet.
fix whenImportsReady
use __resource while loading so .import can be a loaded signal
observer: minor additions, wip.
refine whenImportsReady and use consistently.
remove attribute and stylesheet path resolution from the polyfill. This is not supported in the spec so the polyfill shouldn’t do it.
minor Observer changes
make link/style paths relative to main document