Fixed WebViewBridge destroy method (webview needs to be detached from parent before destroying), added support for hosts with ports to UriUtils
UriUtils refactoring.

ロジックはisSubdomainかどうかより複雑。コメントでちょっと説明しました、もしほかのアイヂアが有れば、どうぞ。
Merge pull request #31 from khaykov/fix_webview_destoy_and_url_utils

Fixed WebViewBridge destroy() method and UrlUtils