Create a tutorial for Orxonox

[dafrick]

We are nearing our first release and it would be prudent to have a tutorial to help newcomers along.

Have a look at how other games introduce the newbie to their game, how they learn to move (in our case fly), shoot, a.s.o.

Firstly you will need to think about what a newbie needs to know to successfully play Orxonox and secondly you need to figure out how you can teach him in a fun way.