1. Add "appUrl" flag for overriding locahost address to support remote website
2. Add "ignoreRedirect" to attache chrome debug service even the url is changed
Add error handle for connecting  chrome debug server
Add "onAppWinClose" callback
Rename the flag "ignoreRedirect"  to "ignoreUrlRedirection"
Merge pull request #1 from jiahansu/master

One issue fix & two new features. onAppWinClose callback support and another way to launch a full web address for content.