Only workspace.
And if you want add this changes to your server, you have to compile project and copy l2jserver.jar (from workspace gameserver/build folder) and paste to your servers libs folder.
Buffer - Preview
Simple Buffer - Preview
Both are .py buffers :P Other npcs you can find here.
Also I must warn you that due to the last commit you have to add one more column (as the last - '0') in npc.sql :P