[PyQt] Provide metadata for source installs

[Phil Thompson]

On 20 May 2018, at 8:33 pm, André <pyqt at andre4all.de> wrote:
> 
> Hi,
> can you provide some metadata file (like egg-info or dist-info) when installing pyqt from source?
> 
> Currently an installed pyqt package is not recognized as intalled by pip which makes it difficult to use it as a requirement in setup.py.
> 
> The wheel distribution provides the metadata but that brings all the Qt library with it which is not usefull if you want to use the packages form your Linux Distribution.

I've implemented this in the current sip snapshot. I'd like some feedback before I go on to add it to PyQt etc.

Phil