Inserted hack to partially plug TK's security problem.  Also hard-coded font selection temporarily (see explanation within).  Made debug menu normally invisible.
Inserted hack to partially plug TK's security problem.  Also hard-coded
font selection temporarily (see explanation within).  Made debug menu
normally invisible.

svn path=/trunk/; revision=277

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot