Clean up the Makefile, package.json

Make the makefile more sane, add minification of CSS, and add and remove
necessary npm modules.

Auditors: alpert

package.json

@@ -10,7 +10,7 @@
         "browserify": "~2.29.1",
         "express": "~3.3.3",
         "less": "~1.4.2",
-        "through": "~2.3.4",
-        "gm": "~1.14.2"
+        "uglify-js": "~2.4.15",
+        "clean-css": "~2.2.15"
     }
 }