chore(package.json): remove local HTTP server's cache-control header

Disable the local HTTP server's cache-control header, to fix the problem
where the browser wouldn't reload templateUrl-based directive templates.

Fixes angular#193
Closes angular#194

Author: joewhite

package.json

@@ -17,7 +17,7 @@
     "postinstall": "bower install",
 
     "prestart": "npm install",
-    "start": "http-server -a localhost -p 8000",
+    "start": "http-server -a localhost -p 8000 -c-1",
 
     "pretest": "npm install",
     "test": "karma start karma.conf.js",