System long description update.

2013-07-05  Didier Verna  <didier@didierverna.net>

	* com.dvlsoft.declt.asd (:com.dvlsoft.declt): Reword the system's
	long description.
Fill one more ASDF 3 system slot.

2013-07-05  Didier Verna  <didier@didierverna.net>

	* com.dvlsoft.declt.asd (:com.dvlsoft.declt): Provide a :LONG-NAME
	option.