ipython notebook & script difference - loading DLLs

Did anyone notice the difference in loading .NET dlls between notebook and normal python scripts.

This works in notebook:

```
import clr
clr.AddReference(r"C:\path2dll\dotnetdll")
```

But in regular python scripts, the sys.path has to be appended with the path to DLL:

```
import clr
import sys
sys.path.append(r"C:\path2dll")
clr.AddReference("dotnetdll")
```
