Adding mouse support for curses-based version of the game

[iliasizmaylov]

Hey!

So I found your game accidentally and got a little bit hooked on it and while playing thought about that it'd be cool to be able to control it with a mouse. So I decided to add support for it and then thought why not make a pull request.

I tested it in a singleplayer mode and it appears to work fine however I wasn't able to start a multiplayer to test because sendto gives me an error when I try to do it. If it's a known issue then fine but if it should work and it's me who is doing something incorrectly - let me know and I'll try to properly test it.

Yeah so that's about it. This game is really fun to play.