Updating meshlab.

Their build system has changed, and the source tree they distribute too, so the
dependencies changed a bit.
To get meshlab working, I update lib3ds and add levmar.

svn path=/nixpkgs/trunk/; revision=19595

pkgs/development/libraries/levmar/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, fetchurl }:
+        
+stdenv.mkDerivation rec {
+  name = "levmar-2.5";
+
+  src = fetchurl {
+    url = "http://www.ics.forth.gr/~lourakis/levmar/${name}.tgz";
+    sha256 = "0xcx9fvymr0j5kmfy5cqaa2lxf1c64vv25z2a28w43pkxz1nl3xp";
+  };
+
+  patchPhase = ''
+    sed -i 's/define HAVE_LAPACK/undef HAVE_LAPACK/' levmar.h
+    sed -i 's/LAPACKLIBS=.*/LAPACKLIBS=/' Makefile
+  '';
+
+  installPhase = ''
+    ensureDir $out/include $out/lib
+    cp lm.h $out/include
+    cp liblevmar.a $out/lib
+  '';
+
+  meta = { 
+    description = "ANSI C implementations of Levenberg-Marquardt, usable also from C++";
+    homepage = http://www.ics.forth.gr/~lourakis/levmar/;
+    license = "GPLv2+";
+  };
+}
+