1) I modified the visit-install script to accept the version number in either
   the form X.Y.Z or X_Y_Z. This resolves #781.

2) I also merged a couple of files from the RC to the trunk from Gunther.



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@15328 18c085ea-50e0-402c-830e-de6fd14e8384