Quote cleaning and better install of new prQ file
Now newly added quote is usable at once.

Duplicated quote made unique.
New Leslie Lamport quote added.
While on it spotted that it's not usable till next quote gets added.
Fixed: problem was where % went in prQ file and what was being installed
(just dat file without text file). Now both files are installed.
Whole quote file made uniform (authors and tabs).

Elegance is not a dispensable luxury but a quality that decides between success and failure.
    		-- Edsgar W. Dijkstra