Added javascript bridge proxy to the currently active webview
Modified WebViewJavascriptBridge: uses global MessageHandlers, removed OSX code
Updated the demo. Removed the page timeout in favor of using error codes instead
Moved files from example to lib.
Added licence for WebViewJavascriptBridge
Example project references Lib and Asset folders by reference
Removed XCode generated files from the example project.
Merge pull request #1 from lokimeyburg/feature/javascript-bridge

Feature/javascript bridge