move osd to npm

Gruntfile.js

@@ -30,7 +30,7 @@ module.exports = function(grunt) {
     'node_modules/javascript-state-machine/state-machine.min.js',
     'node_modules/tinymce/tinymce.min.js',
     'node_modules/handlebars/dist/handlebars.js',
-    'js/lib/openseadragon.js',
+    'node_modules/openseadragon/build/openseadragon/openseadragon.js',
     'node_modules/d3/d3.min.js',
     'js/lib/pubsub.min.js',
     'js/lib/URI.min.js',

package.json

@@ -59,6 +59,7 @@
     "jquery-migrate": "^3.0.0",
     "jquery-ui-dist": "^1.12.1",
     "jquery.scrollto": "^1.4.12",
+    "openseadragon": "^2.2.1",
     "tinymce": "^4.1.7"
   },
   "engine": "node < 7.0.0"