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/add_csv_window.hpp

@@ -0,0 +1,50 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#pragma once
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+
+DECLARE_POINTER_TYPE(Set);
+
+// ----------------------------------------------------------------------------- : AddCSVWindow
+
+/// A window for selecting a subset of the cards from a set,
+/** and selecting a link relation type.
+/** this is used when linking cards
+ */
+class AddCSVWindow : public wxDialog {
+public:
+	AddCSVWindow(Window* parent, const SetP& set, bool sizer);
+
+protected:
+	DECLARE_EVENT_TABLE();
+
+	wxChoice*       separator_type;
+	wxTextCtrl*     file_path;
+	wxButton*       file_browse;
+	SetP            set;
+	char            separator;
+
+	std::vector<std::string> readCSVRow(const std::string& row);
+	
+	void setSeparatorType();
+
+	void onSeparatorTypeChange(wxCommandEvent&);
+
+	void onBrowseFiles(wxCommandEvent&);
+
+	void onOk(wxCommandEvent&);
+
+};
+
+enum class CSVState {
+	UnquotedField,
+	QuotedField,
+	QuotedQuote
+};