Question: how to wrap seelog in own package?

Hi there,

I want to use seelog in a mixed hosting environment: appengine and standalone.

Since appengine has its own logging mechanism - attached to the [Context interface](http://godoc.org/code.google.com/p/appengine-go/appengine#Context) - I want to have a custom log package that abstracts this away.

But when I create a struct and call the Info method which delegates to seelog, I see this
```
[2013-09-05 23:50:33] [INFO] [101loops/log.(*Logger).Info] ...
```

instead of
```
[2013-09-05 23:50:33] [INFO] [101loops/module.start] ...
```

How can I make seelog log the correct location when being wrapped?