Named readtables

[ruricolist]

I'd like to propose switching CXML to use named-readtables. It would allow removing the component classes from the .asd file, moving it in a much more declarative direction.

This isn't technically challenging (I already did it for FXML) but it would require a coordinated change across closure-common and CXML so I wanted to raise it for discussion first.

You can see the contemplated changes in these commits:

ruricolist/FXML@fd1ffd9
ruricolist/FXML@fd1ffd9

[slyrus]

I'm all for it!

[scymtym]

I'm all for it!

Same.

You can see the contemplated changes in these commits:

ruricolist/FXML@fd1ffd9
ruricolist/FXML@fd1ffd9

Both links point to the same commit. That commit lgtm, though.

@ruricolist Since we all agree about wanting this, would you make a pull request?