Added multiple skins

... and support for even more skins! There's a new option in the
spawn-menu to change your default skin. This is (by default) set to the
new 2010 skin provided generously by Benjamoose. To change your skin
temporarily however, you may hold c - right click on it- and go there. 0
is new 2010, 1 is 2005 and 2 is old 2010.