Added primitive for Crossword Exporting.

Added first exporting function

src/crossexport.hpp

@@ -5,4 +5,23 @@
 
 #include "crossbasetypes.hpp"
 
+//wxTextFile::GetEOL()
+
+void exportToString(const FilledCrossword &cross, const bool prn_ans, wxString &str_out){
+    
+}
+
+bool exportToFile(const FilledCrossword &cross, const bool prn_ans, const wxString path){
+    wxTextFile f(path);
+    if ( f.Exists() )
+        return false;
+    f.Create();
+    wxString cont;
+    exportToString(cross, prn_ans, cont);
+    f.AddLine(cont);
+    f.Write();
+    f.Close();
+    return true;
+}
+
 #endif // CROSSEXPORT_HPP