Add repository to package.json so we can use npm docs.

- Also remove empty dependencies object that npm copmplains about

package.json

@@ -7,8 +7,8 @@
   "contributors"  : [
     {"name": "Christoph Tavan <dev@tavan.de>", "github": "https://github.com/ctavan"}
   ],
-  "dependencies"  : {},
   "lib"           : ".",
   "main"          : "./uuid.js",
+  "repository"    : { "type" : "git", "url" : "https://github.com/broofa/node-uuid.git" },
   "version"       : "1.3.3"
 }