Added ability to throw .NET exceptions as native iOS exceptions
By default exceptions reported to HockeyApp would not contain .NET stack traces.  The library now contains a utility method to help re-throw .NET Exception objects as NSException's so that they include the stack trace of the .NET exception.  The sample has also been updated to show how to use it.
Fixed license for sample
Merge pull request #207 from Redth/master

[HockeyApp] Added ability to throw .NET exceptions as native iOS exceptions