CVS commit by staikos: revert plugins from matrices. Too much is fundamentally wrong to leave this in right now. M +2 -18 kstmatrix.cpp 1.20 M +0 -7 kstmatrix.h 1.15 M +31 -204 kstplugin.cpp 1.91 M +0 -14 kstplugin.h 1.37 M +3 -108 kstplugindialog_i.cpp 1.103