Use ejs to render the app cache and cache buster tokens

package-lock.json

@@ -635,11 +635,35 @@
         }
       }
     },
+    "caller-callsite": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/caller-callsite/-/caller-callsite-2.0.0.tgz",
+      "integrity": "sha1-hH4PzgoiN1CpoCfFSzNzGtMVQTQ=",
+      "dev": true,
+      "requires": {
+        "callsites": "2.0.0"
+      }
+    },
+    "caller-path": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-2.0.0.tgz",
+      "integrity": "sha1-Ro+DBE42mrIBD6xfBs7uFbsssfQ=",
+      "dev": true,
+      "requires": {
+        "caller-callsite": "2.0.0"
+      }
+    },
     "callsite": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
       "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
     },
+    "callsites": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
+      "integrity": "sha1-BuuE8A7qQT2oav/vrL/7Ngk7PFA=",
+      "dev": true
+    },
     "camelcase": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
@@ -735,6 +759,16 @@
         "chalk": "1.1.3"
       }
     },
+    "clear-require": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/clear-require/-/clear-require-2.0.0.tgz",
+      "integrity": "sha1-qgH1w1WJMmvVXphp6r2kj4ZEfes=",
+      "dev": true,
+      "requires": {
+        "caller-path": "2.0.0",
+        "resolve-from": "2.0.0"
+      }
+    },
     "cliff": {
       "version": "0.1.10",
       "resolved": "https://registry.npmjs.org/cliff/-/cliff-0.1.10.tgz",
@@ -1330,8 +1364,7 @@
     "ejs": {
       "version": "2.5.7",
       "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.5.7.tgz",
-      "integrity": "sha1-zIcsFoiArjxxiXYv1f/ACJbJUYo=",
-      "dev": true
+      "integrity": "sha1-zIcsFoiArjxxiXYv1f/ACJbJUYo="
     },
     "electron-to-chromium": {
       "version": "1.3.18",
@@ -4523,6 +4556,15 @@
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.1.tgz",
       "integrity": "sha1-yKuMkiO6NIiKpkopeyiFO+wY2lY="
     },
+    "path": {
+      "version": "0.12.7",
+      "resolved": "https://registry.npmjs.org/path/-/path-0.12.7.tgz",
+      "integrity": "sha1-1NwqUGxM4hl+tIHr/NWzbAFAsQ8=",
+      "requires": {
+        "process": "0.11.10",
+        "util": "0.10.3"
+      }
+    },
     "path-browserify": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz",
@@ -5263,6 +5305,11 @@
       "resolved": "https://registry.npmjs.org/querystring-es3/-/querystring-es3-0.2.1.tgz",
       "integrity": "sha1-nsYfeQSYdXB9aUFFlv2Qek1xHnM="
     },
+    "random-token": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/random-token/-/random-token-0.0.8.tgz",
+      "integrity": "sha1-HPhFrz+zHlf3yqS5oXNHjEZIO2E="
+    },
     "randomatic": {
       "version": "1.1.7",
       "resolved": "https://registry.npmjs.org/randomatic/-/randomatic-1.1.7.tgz",