Don't include everything into the npm package.

package.json

@@ -4,11 +4,9 @@
   "url"           : "http://backbonejs.org",
   "keywords"      : ["util", "functional", "server", "client", "browser"],
   "author"        : "Jeremy Ashkenas <[email protected]>",
-  "contributors"  : [],
   "dependencies"  : {
     "underscore"  : ">=1.3.1"
   },
-  "lib"           : ".",
   "main"          : "backbone.js",
   "version"       : "0.9.2"
 }