Pasteable objects

[mariari]

It would be nice if we could give each other example code over the wired.

To do this I propose the following

We implement the following method

(defgeneric make-eval-form (object))

with the following instances

(defmethod make-eval-form ((object pointwise-mixin)) ...)
(defmethod make-eval-form ((object meta-mixin)) ...)
(defmethod make-eval-form ((object hash-table)) ...)
(defmethod make-eval-form ((object symbol)) ...)
(defmethod make-eval-from ((object number)) ...)
(defmethod make-eval-form ((object string)) ...)

we ideally want to carry over meta-data, however these should suffice to give a term which we can copy and paste to each other