updated shouldOverrideUrlLoading event for #146, added print method and event...

updated shouldOverrideUrlLoading event for #146, added print method and event #128, fix #123 javascript handler for Android API <= 22, renamed onTargetBlank to onCreateWindow event, deleted useOnTargetBlank option, added supportMultipleWindows android option, added getDefaultUserAgent static method, Updated default value for domStorageEnabled option to true

README.md

@@ -502,9 +502,10 @@ class MyInAppBrowser extends InAppBrowser {
   }
 
   @override
-  void shouldOverrideUrlLoading(ShouldOverrideUrlLoadingRequest shouldOverrideUrlLoadingRequest) {
+  Future<ShouldOverrideUrlLoadingAction> shouldOverrideUrlLoading(ShouldOverrideUrlLoadingRequest shouldOverrideUrlLoadingRequest) async {
     print("\n\n override ${shouldOverrideUrlLoadingRequest.url}\n\n");
     this.webViewController.loadUrl(url: shouldOverrideUrlLoadingRequest.url);
+    return ShouldOverrideUrlLoadingAction.CANCEL;
   }
 
   @override

example/lib/in_app_browser_example.screen.dart

@@ -37,9 +37,10 @@ class MyInAppBrowser extends InAppBrowser {
   }
 
   @override
-  void shouldOverrideUrlLoading(String url, Map<String, String> headers, bool isForMainFrame) {
-    print("\n\n override $url\n\n");
-    this.webViewController.loadUrl(url: url);
+  Future<ShouldOverrideUrlLoadingAction> shouldOverrideUrlLoading(ShouldOverrideUrlLoadingRequest shouldOverrideUrlLoadingRequest) async {
+    print("\n\n override ${shouldOverrideUrlLoadingRequest.url}\n\n");
+    this.webViewController.loadUrl(url: shouldOverrideUrlLoadingRequest.url);
+    return ShouldOverrideUrlLoadingAction.CANCEL;
   }
 
   @override