Set the data directory in server options.
Add license schema.
Rename directory, from campaign_server to umcd.
Change campaign_server to umcd in the cmake files.
Change campaign_server to umcd in the scons files.
Merge branch 'asio_campaignd' of https://github.com/wesnoth/wesnoth-old into asio_campaignd
Change campaign_server to umcd in the travis files.