This commit enabled using keyboard keys to play the game.
However I did notice that if people smash the keys repeatedly when the game is not started or hitting the same key that has been pressed before can create many useless http requests on the slots which can cause a lot of load on the server.
I tried to disable/disconnect the signal and the slots but there was no method for it.
There should be a disconnect method for slots and/or disable method for events to prevent useless signals being emitted by http requests.
Merge pull request #6 from SaiFi0102/hangman

This commit enables using keyboard keys to play the game.