Implemented improvements suggested by Alan:
Implemented improvements suggested by Alan:

* In the call to configure, removed some options that correspond to defaults.

* Call cvs export instead of cvs checkout, such that the removal of the cVS
  directories is not necessary.

svn path=/trunk/; revision=4739

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