Add the constraint unique on several columns and remove the constraint on a single column.
Add support for the operator <<(otl_stream, boost::posix_time::ptime).
Change the database to be compatible with the parser and add a unique constraint on the (name,version) couple in the add-on version.
Update the upload request to add data inside the addon_version table.
Add timeout on asynchronous transfer and correction of some design issue in the transfer EDP.
Merge branch 'asio_umcd' of https://github.com/wesnoth/wesnoth-old into asio_umcd
Add reference in event slot.