Move upstream saveload to src/saveload/, move jgrpp saveload to src/sl/

Leave afterload in src/saveload/

src/sl/tbtr_template_replacement_sl.cpp

@@ -0,0 +1,35 @@
+#include "../stdafx.h"
+
+#include "../tbtr_template_vehicle.h"
+
+#include "saveload.h"
+
+static const SaveLoad _template_replacement_desc[] = {
+	SLE_VAR(TemplateReplacement, sel_template, SLE_UINT16),
+	SLE_VAR(TemplateReplacement, group, SLE_UINT16),
+};
+
+static void Save_TMPL_RPLS()
+{
+	for (TemplateReplacement *tr : TemplateReplacement::Iterate()) {
+		SlSetArrayIndex(tr->index);
+		SlObject(tr, _template_replacement_desc);
+	}
+}
+
+static void Load_TMPL_RPLS()
+{
+	int index;
+
+	while ((index = SlIterateArray()) != -1) {
+		TemplateReplacement *tr = new (index) TemplateReplacement();
+		SlObject(tr, _template_replacement_desc);
+	}
+	ReindexTemplateReplacements();
+}
+
+extern const ChunkHandler template_replacement_chunk_handlers[] = {
+	{ 'TRPL', Save_TMPL_RPLS, Load_TMPL_RPLS, nullptr, nullptr, CH_ARRAY },
+};
+
+extern const ChunkHandlerTable _template_replacement_chunk_handlers(template_replacement_chunk_handlers);