Remove bower from 15.x completely (#60)

* Remove bower from 15.x completely

.travis.yml

@@ -12,6 +12,4 @@ addons:
   chrome: latest
 
 install:
-  - npm install -g bower
   - npm install
-  - bower install

bower.json

@@ -1,33 +0,0 @@
-{
-  "name": "vaadin",
-  "description": "Bundle containing all web components which are part of the Vaadin platform",
-  "homepage": "https://github.com/vaadin/vaadin",
-  "authors": [
-    "Vaadin Ltd"
-  ],
-  "main": "vaadin.html",
-  "license": [
-    "Apache-2.0",
-    "https://vaadin.com/license/cval-3.0"
-  ],
-  "ignore": [
-    "**/.*",
-    "node_modules",
-    "bower_components",
-    "test",
-    "tests",
-    "update-core-version.js"
-  ],
-  "dependencies": {
-    "vaadin-core": "15.0.0-alpha9",
-    "vaadin-board": "vaadin-board#2.1.1",
-    "vaadin-charts": "vaadin-charts#6.2.4",
-    "vaadin-confirm-dialog": "vaadin-confirm-dialog#1.1.5",
-    "vaadin-cookie-consent": "vaadin-cookie-consent#1.1.2",
-    "vaadin-crud": "vaadin-crud#1.1.0",
-    "vaadin-grid-pro": "vaadin-grid-pro#2.0.5",
-    "vaadin-rich-text-editor": "vaadin-rich-text-editor#1.1.1",
-    "vaadin-license-checker": "vaadin-license-checker#2.1.2",
-    "cookieconsent": "cookieconsent#3.1.0"
-  }
-}

package.json

@@ -18,9 +18,6 @@
   "files": [
     "vaadin.js"
   ],
-  "scripts": {
-    "version": "node update-core-version.js && git add bower.json"
-  },
   "keywords": [
     "vaadin",
     "core",

update-core-version.js

@@ -1,8 +0,0 @@
-var fs = require('fs');
-const fileName = './bower.json';
-var bowerjson = require(fileName);
-
-const version = require('./package.json').version;
-bowerjson.dependencies["vaadin-core"] = version;
-
-fs.writeFileSync(fileName, JSON.stringify(bowerjson, null, 2));

vaadin.html

@@ -1,9 +0,0 @@
-<link rel="import" href="../vaadin-core/vaadin-core.html">
-<link rel="import" href="../vaadin-board/vaadin-board.html">
-<link rel="import" href="../vaadin-charts/vaadin-chart.html">
-<link rel="import" href="../vaadin-confirm-dialog/vaadin-confirm-dialog.html">
-<link rel="import" href="../vaadin-cookie-consent/vaadin-cookie-consent.html">
-<link rel="import" href="../vaadin-crud/vaadin-crud.html">
-<link rel="import" href="../vaadin-grid-pro/vaadin-grid-pro.html">
-<link rel="import" href="../vaadin-grid-pro/vaadin-grid-pro-edit-column.html">
-<link rel="import" href="../vaadin-rich-text-editor/vaadin-rich-text-editor.html">