feat(select): ion-select using alert radio/checkbox options

Closes #890 Closes #826 Closes #886

ionic/components/select/test/multiple-value/e2e.ts

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+

ionic/components/select/test/multiple-value/index.ts

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+import {App, Page} from 'ionic/ionic';
+
+
+@Page({
+  templateUrl: 'main.html'
+})
+class E2EPage {}
+
+
+@App({
+  template: '<ion-nav [root]="root"></ion-nav>'
+})
+class E2EApp {
+  constructor() {
+    this.root = E2EPage;
+  }
+}

ionic/components/select/test/multiple-value/main.html

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+<ion-toolbar><ion-title>Select Item: Multiple Value</ion-title></ion-toolbar>
+
+<ion-content class="outer-content">
+
+  <ion-select [(ngModel)]="topings" multiple="true">
+    <ion-label>Topings</ion-label>
+    <ion-option value="bacon">Bacon</ion-option>
+    <ion-option value="olives">Black Olives</ion-option>
+    <ion-option value="xcheese">Extra Cheese</ion-option>
+    <ion-option value="peppers">Green Peppers</ion-option>
+    <ion-option value="mushrooms">Mushrooms</ion-option>
+    <ion-option value="onions">Onions</ion-option>
+    <ion-option value="pepperoni">Pepperoni</ion-option>
+    <ion-option value="pineapple">Pineapple</ion-option>
+    <ion-option value="Sausage">Sausage</ion-option>
+    <ion-option value="Spinach">Spinach</ion-option>
+  </ion-select>
+
+  <ion-select [(ngModel)]="carOptions" multiple="true">
+    <ion-label>Car Options</ion-label>
+    <ion-option value="backupcamera">Backup Camera</ion-option>
+    <ion-option value="heatedseats">Headted Seats</ion-option>
+    <ion-option value="keyless">Keyless Entry</ion-option>
+    <ion-option value="navigation">Navigation</ion-option>
+    <ion-option value="parkingassist">Parking Assist</ion-option>
+    <ion-option value="sunroof">Sun Roof</ion-option>
+  </ion-select>
+
+  <p aria-hidden="true" padding>
+    <code>topings: {{topings}}</code><br>
+    <code>carOptions: {{carOptions}}</code><br>
+  </p>
+
+</ion-content>