Don't require cl, picture, or reporter.

Don't require cl, picture, or reporter.
Don't provide new-dabbrev.
(dabbrev--try-find): Don't use `loop'.
Don't create or kill local bindings.
(dabbrev-completion): Use key-description to say what to type.
Fix style of "done" message.
(dabbrev-submit-feedback): Function deleted.
(dabbrev--same-major-mode-p): Simplify.
(dabbrev-completion, dabbrev--abbrev-at-point): Fix error msg style.

(dabbrev-filter-elements): New macro.
(dabbrev--select-buffers, dabbrev--find-expansion): Use that.
(dabbrev--search): Use that.