chore(build): rename ionic directory to src and update all references in the build process.

src/components/tabs/tab-button.ts

@@ -0,0 +1,58 @@
+import {Component, Directive, ElementRef, Optional, Host, forwardRef, ViewContainerRef, HostListener, EventEmitter, Output, Input, Renderer} from '@angular/core';
+
+import {Tab} from './tab';
+import {Ion} from '../ion';
+import {Config} from '../../config/config';
+
+
+/**
+ * @private
+ */
+@Directive({
+  selector: '.tab-button',
+  host: {
+    '[attr.id]': 'tab._btnId',
+    '[attr.aria-controls]': 'tab._panelId',
+    '[attr.aria-selected]': 'tab.isSelected',
+    '[class.has-title]': 'hasTitle',
+    '[class.has-icon]': 'hasIcon',
+    '[class.has-title-only]': 'hasTitleOnly',
+    '[class.icon-only]': 'hasIconOnly',
+    '[class.has-badge]': 'hasBadge',
+    '[class.disable-hover]': 'disHover'
+  }
+})
+export class TabButton extends Ion {
+  private disHover: boolean;
+  private hasTitle: boolean;
+  private hasIcon: boolean;
+  private hasTitleOnly: boolean;
+  private hasIconOnly: boolean;
+  private hasBadge: boolean;
+  private _layout: string;
+
+  @Input() tab: Tab;
+  @Output() select: EventEmitter<Tab> = new EventEmitter();
+
+  constructor(config: Config, elementRef: ElementRef) {
+    super(elementRef);
+    this.disHover = (config.get('hoverCSS') === false);
+    this._layout = config.get('tabbarLayout');
+  }
+
+  ngOnInit() {
+    this.tab.btn = this;
+    this._layout = this.tab.parent.tabbarLayout || this._layout;
+
+    this.hasTitle = !!this.tab.tabTitle;
+    this.hasIcon = !!this.tab.tabIcon && this._layout !== 'icon-hide';
+    this.hasTitleOnly = (this.hasTitle && !this.hasIcon);
+    this.hasIconOnly = (this.hasIcon && !this.hasTitle);
+    this.hasBadge = !!this.tab.tabBadge;
+  }
+
+  @HostListener('click')
+  private onClick() {
+    this.select.emit(this.tab);
+  }
+}