* refactoring
* allow for creation of games as spectator
allow setting the amount of games per user to none
remove limit on amount of games when creating a game as judge as
spectator
* refactor common/server_player.cpp
* do not close games with spectating host automatically
* remove check that filters out 0 player games
this check didn't really do anything, deleted games are removed before
it would be reached
* don't transfer host to spectators
this seems to cause a bug, also present on master
* Run tests on Windows CI.
* Add message logger
* Skip tests that cannot be linked.
* Fix test call
* Fix mock link issue on MSVC
* Fix PATH variable to find libraries for tests
* Fail test step on test errors
