add manifest.json for google drive

Author: socrateslee

demo/manifest.json

@@ -0,0 +1,16 @@
+ {
+    "name" : "mdReader",
+    "version" : "0.5",
+    "manifest_version" : 2,
+    "description" : "A simple markdown reader for Google Drive",
+    "container" : "GOOGLE_DRIVE",
+    "api_console_project_id" : "mdreader-googledrive",
+    "icons": {
+      "128": "icon.png"
+    },
+    "app" : {
+      "launch" : {
+      "web_url" : "http://socrateslee.github.io/mdreader/"
+      }
+    }
+  }