Support detail notify data

Sorry for the drastically change... I think we can support detail notify data.

```rb
  UniformNotifier.xxx.out_of_channel_notify(:title => "title", :stacktrace => "something\msomething\n")
```

Handling the detail data as string is up to the notifier. Exception management service can show the backtraces separately from the message.

This change also support the old protocol of passing string.