generics describe the API, so put them in the docs
ASDF-only is obsolete.
Quicklisp is the one true way
(or direct from github or other mirrors)

Signed-off-by: AJ Rossini <blindglobe@gmail.com>
start mixing in xarray-like virtual class.  New LISP-MATRIX requires this.

Signed-off-by: AJ Rossini <blindglobe@gmail.com>