Add appcache support for offline standalone app

package.json

@@ -1,6 +1,6 @@
 {
   "name": "coriolis_shipyard",
-  "version": "0.8.0",
+  "version": "0.8.1",
   "repository": {
     "type": "git",
     "url": "https://github.com/cmmcleod/coriolis"
@@ -13,11 +13,11 @@
     "gulp": "^3.8.11",
     "gulp-angular-templatecache": "^1.6.0",
     "gulp-concat": "^2.5.2",
-    "gulp-exec": "^2.1.1",
     "gulp-htmlmin": "^1.1.1",
     "gulp-jshint": "^1.10.0",
     "gulp-jsonlint": "^1.0.2",
     "gulp-less": "^3.0.2",
+    "gulp-manifest": "0.0.6",
     "gulp-minify-css": "^1.0.0",
     "gulp-rev-all": "^0.8.18",
     "gulp-sourcemaps": "^1.5.1",