(define-minor-mode): If KEYMAP is a symbol, just use it.

(define-minor-mode): If KEYMAP is a symbol, just use it.
Use byte-compile-current-file and load-file-name to infer the
proper :require to pass to defcustom.
Wrap the hook var into `progn' so as not to autoload it.
Add a :autoload-end cookie.
Be more careful about the evaluation of KEYMAP.
(easy-mmode-define-global-mode): Add a :autoload-end cookie.
(define-derived-mode): Move define-abbrev-table outside of defvar.