Implemented a main menu to choose single player or multiplayer

• Of course, will expand the buttons and add more to the main menu as updates keep coming on.
• Two choices so far, Single Player as the game has been, or Live Multiplayer to face a human player!

You can either host your own server or connect to a host!

• Knowing s&box has low traffic at times will be difficult to find a server, invite a friend!
• It will prompt you to wait until someone you invite joins
• Vice versa if someone invited you
• Or, if traffic is good that day, connect to a host of a public server and fight it out!

The Battle Awaits!!! 

"I'm tired of these shitters" - garry