Implement configured build of tk directory. Fix configured commenting out of many rules. Improve test_interactive target dependencies.
Implement configured build of tk directory.
Fix configured commenting out of many rules.
Improve test_interactive target dependencies.

svn path=/trunk/; revision=9431

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