Drop dependence on libagg since the location of the tarball is still not settled, and libagg is only needed for one component of the wxwidgets device driver which is scheduled to be dropped in any case.
Drop dependence on libagg since the location of the tarball is still
not settled, and libagg is only needed for one component of the
wxwidgets device driver which is scheduled to be dropped in any case.

Change plplot dependence from qt4_lite to qt5_lite and exclusively use
Qt5 for plplot epa_build and tests.

The epa_build of qt5_lite and the epa_build and test of PLplot
were comprehensively tested (all three build systems all three major
configurations) on Linux with no issues.


svn path=/trunk/; revision=13112

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