Implement CSV / TSV import (#45)

- add csv/tsv importer
- add `make_map` script function
- add `alt name` field property
- add `construction script` field property
- add `construction script` game property

src/gui/control/card_list.cpp

@@ -10,7 +10,8 @@
 #include <gui/control/card_list.hpp>
 #include <gui/control/card_list_column_select.hpp>
 #include <gui/set/window.hpp> // for sorting all cardlists in a window
-#include <gui/util.hpp>
+#include <gui/util.hpp>
+#include <gui/add_csv_window.hpp>
 #include <data/game.hpp>
 #include <data/field.hpp>
 #include <data/field/choice.hpp>
@@ -180,6 +181,15 @@ bool CardListBase::doDelete() {
   set->actions.addAction(make_unique<AddCardAction>(REMOVE, *set, cards_to_delete));
   return true;
 }
+
+bool CardListBase::doAddCSV() {
+  AddCSVWindow wnd(this, set, true);
+  if (wnd.ShowModal() == wxID_OK) {
+    // The actual adding is done in this window's onOk function
+    return true;
+  }
+  return false;
+}
 
 // ----------------------------------------------------------------------------- : CardListBase : Building the list