Clean up node metadata

- Fix dev-dependency installation
- Fix npm license format warning
- Ignore node_modules

Now dev-deps can be installed simply by running "npm install".
Because of npm/npm#3059, this requires the in-publish module.

Change-Id: Idc2eeca5b172de50760a6fadacb1d1088985f840

.gitignore

@@ -1,4 +1,5 @@
 *.pyc
+node_modules
 third_party/closure/goog/deps.js
 shaka-player.compiled.js
 shaka-player.compiled.debug.js

karma.conf.js

@@ -1,14 +1,5 @@
 // Karma configuration
-
-// Required modules:
-//   karma
-//   karma-jasmine
-//   karma-jasmine-ajax
-//   jasmine
-//   jasmine-ajax
-//   jasmine-core
-// Optional modules:
-//   karma-coverage
+// Install required modules by running "npm install"
 
 module.exports = function(config) {
   config.set({

package.json

@@ -11,6 +11,7 @@
     }
   ],
   "devDependencies": {
+    "in-publish": "",
     "karma": ">=0.13.9 <= 0.13.14",
     "karma-coverage": "",
     "karma-jasmine": "",
@@ -32,14 +33,8 @@
   "bugs": {
     "url": "https://github.com/google/shaka-player/issues"
   },
-  "license": "Apache License 2.0",
-  "licenses": [
-    {
-      "type": "Apache",
-      "url": "https://github.com/google/shaka-player/blob/master/LICENSE"
-    }
-  ],
+  "license": "Apache-2.0",
   "scripts": {
-    "prepublish": "./build/checkversion.sh && ./build/all.sh"
+    "prepublish": "in-publish && ./build/checkversion.sh && ./build/all.sh || not-in-publish"
   }
 }