Adding npm install to build process for coral-admin so build works.

client/coral-admin/config.sample.json

@@ -1,3 +0,0 @@
-{
-  "basePath": "client/coral-admin"
-}

client/coral-admin/package.json

@@ -4,7 +4,7 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "build": "./node_modules/.bin/webpack --config webpack.config.js",
+    "build": "npm install && ./node_modules/.bin/webpack --config webpack.config.js",
     "start": "./node_modules/.bin/webpack-dev-server --config webpack.config.dev.js --inline --hot --content-base public --port 3142"
   },
   "keywords": [],