ExceptHandler.name type

[Matthieu Dartiailh]

In Python 2 ExceptHandler.name was a Name node not a simple string. The docs should be updated to reflect this.

[Thomas Kluyver]

Mention Python 2 difference for ExceptHandler, update example.

Closes issue #5

→ <<cset cf211f6ab882>>

[Thomas Kluyver]

Thanks for pointing this out!