Update master port to emacs21.
Update slave ports to stub port:
flim113-emacs20, flim113-mule, flim113-xemacs21-mule.
Remove slave ports:
flim113-emacs.
Add slave stub ports:
flim113-emacs19 for emacs-19.x ports.
Install el/elc files to version specific site-lisp directory.
Change some style.
