add block.reload_script, item.reload_script

src/engine/Engine.cpp

@@ -484,6 +484,10 @@ const Content* Engine::getContent() const {
     return content.get();
 }
 
+Content* Engine::getWriteableContent() {
+    return content.get();
+}
+
 std::vector<ContentPack> Engine::getAllContentPacks() {
     auto packs = getContentPacks();
     packs.insert(packs.begin(), ContentPack::createCore(paths));