usql update

usql is still very primitive..it just barely works

usql/table.h

@@ -10,7 +10,6 @@ namespace usql {
     struct Table {
 
 	Table(const Table &other);
-
 	Table(const std::string name, const std::vector<ColDefNode> columns);
 
 	ColDefNode get_column_def(const std::string &col_name);
@@ -19,6 +18,7 @@ namespace usql {
 
 	Row createEmptyRow();   // TODO this means unnecessary copying
 	void addRow(const Row &row);
+	void addCopyOfRow(const Row &row);
 
 	void print();