Allow mixing with indented code

[ole-tange]

I will be working with others on projects and will be maintaining some of their code.

For this it would be nice if I could simply change their code and mix indented code with braced code.

[mathialo]

In my opinion, this could quickly become a mess. It would be better to translate the whole file from indented to braced, and back again. With the new py2by translator, this would be possible.