load dev-mode code from source code comments (removed by minification)

 - change the dev mode detection: remove 'is bundled' check, add 'is minified' check
 - remove dev mode code loading from HTML imports / ES modules / etc
 - add dev mode code loading from source code comments
 - started a new major (2.0.0)

.gitignore

@@ -1,2 +1,3 @@
+node_modules
 bower_components
-test/build
+build

README.md

@@ -5,19 +5,19 @@ Utility method for detecting that an application using Vaadin Elements is runnin
 There are no automatic tests as the functionality depends on the host the code is run on (localhost vs others) and the bundling status.
 
 To verify functionality:
+1. Run `npm install`
 1. Run `bower install`
-1. Run `cd test && bower install ; cd ..`
-1. Run `polyserve -H 0.0.0.0`
-1. Open http://localhost:8080/test/index.html
+1. Run `npm start`
+1. Open http://localhost:8081/test/index.html
   1. Verify that `mode` is `development` (green)
-  1. Verify that `importIfDevelopmentMode` is `imported` (green)
-1. Open http://`<yourip>`:8080/test/index.html
+  1. Verify that `importIfDevelopmentMode` is `run` (green)
+1. Open http://`<yourip>`:8081/test/index.html
   1. Verify that `mode` is `production` (orange)
   1. Verify that `importIfDevelopmentMode` is `ignored` (orange)
-1. Run `cd test/bower_components && ln -s ../../vaadin-development-mode-detector.html && cd .. && polymer build --bundle`
-1. Open http://localhost:8080/test/build/default/index.html
+1. Run `npm run start:prod`
+1. Open http://localhost:8081/test/index.html
   1. Verify that `mode` is `production` (orange)
   1. Verify that `importIfDevelopmentMode` is `ignored` (orange)
-1. Open http://`<yourip>`:8080/test/build/default/index.html
+1. Open http://`<yourip>`:8081/test/index.html
     1. Verify that `mode` is `production` (orange)
     1. Verify that `importIfDevelopmentMode` is `ignored` (orange)

bower.json

@@ -15,8 +15,5 @@
   },
   "devDependencies": {
     "webcomponentsjs": "webcomponents/webcomponentsjs#^1.0.0"
-  },
-  "resolutions": {
-    "polymer": "^2.0.0"
   }
 }