All external API source files: replaced call to plexit() on simple (recoverable) errors with simply printing the error message (via plabort()) and returning.  Should help avoid loss of computer time in some critical circumstances (during a long batch run, for example).
All external API source files: replaced call to plexit() on simple
(recoverable) errors with simply printing the error message (via
plabort()) and returning.  Should help avoid loss of computer time in some
critical circumstances (during a long batch run, for example).

svn path=/trunk/; revision=736

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