LASzip: michelk as maintainer; adjust description; remove blank-lines; using sha256

lib/maintainers.nix

···
   marcweber = "Marc Weber <[e-mail]>";
   matejc = "Matej Cotman <[e-mail]>";
   meisternu = "Matt Miemiec <[e-mail]>";
+  michelk = "Michel Kuhlmann <[e-mail]>"
   modulistic = "Pablo Costa <[e-mail]>";
   mornfall = "Petr Ročkai <[e-mail]>";
   MP2E = "Cray Elliott <[e-mail]>";

pkgs/development/libraries/LASzip/default.nix

···
     description = "Turn quickly bulky LAS files into compact LAZ files without information loss";
     homepage = http://www.laszip.org;
     license = stdenv.lib.licenses.lgpl2;
+    maintainer = stdenv.maintainers.michelk;
     platforms = stdenv.lib.platforms.linux;
   };
 }