Adding Rigs of Rods.

Basically it builds, but I still don't know how to run it. I imagine the
installPhase is still too poor, but it's better than nothing.

I also added two mygui versions. That stable, and that required by Rigs of Roads (svn).

svn path=/nixpkgs/trunk/; revision=26618

pkgs/development/libraries/mygui/default.nix

@@ -0,0 +1,20 @@
+{stdenv, fetchurl, unzip, ogre, cmake, ois, freetype, libuuid, boost}:
+
+stdenv.mkDerivation rec {
+  name = "mygui-3.0.1";
+  
+  src = fetchurl {
+    url = mirror://sourceforge/my-gui/MyGUI_3.0.1_source.zip;
+    sha256 = "1n56kl8ykzgv4k2nm9317jg9b9x2qa3l9hamz11hzn1qqjn2z4ig";
+  };
+
+  enableParallelBuilding = true;
+
+  buildInputs = [ unzip ogre cmake ois freetype libuuid boost ];
+
+  meta = {
+    homepage = http://mygui.info/;
+    description = "Library for creating GUIs for games and 3D applications";
+    license = "LGPLv3+";
+  };
+}