demo stuff

[Daniel J S. <dan...@ie...>]

Some observations about demos:

borders.dem isn't very useful.  Too fast to see what is on the page. 
 Plus requires CNTRL-C to exit.

The following demos are not in all.dem:
    borders.dem
    candlesticks.dem
    charset.dem
    enhancedtext.dem
    multiplt.dem (such a nice demo)
    starmap.dem (another nice demo)
    vector.dem (another nice demo)

mousevariables.dem, fontfile.dem and fontfile_latex.dem aren't in 
all.dem, but on purpose I think.  Not finding the font files will cause 
gnuplot to error out.  Maybe they could be put at the very end of 
all.dem so that if they do crash, nothing will be missed.  (Include them 
might be good because "all.dem" is a way of testing that nothing is 
broke in gnuplot.)