bunch of stuff. very basic drag/drop now working

rowholder.cpp

@@ -0,0 +1,19 @@
+#include "rowholder.hpp"
+
+RowHolder::RowHolder()
+{
+    _layout = new QVBoxLayout();
+    _layout->setAlignment(Qt::AlignTop);
+    setLayout(_layout);
+}
+
+void RowHolder::addRow(TierRow* row)
+{
+    row->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);
+    _layout->addWidget(row, 0, Qt::AlignTop);
+}
+
+RowHolder::~RowHolder()
+{
+
+}