Added support for the upload api (currently set to require 1.17; will switch to 1.16 once deployed on Wikimedia)

* Fix mwclient on WMF wikis

* indent fix in upload.py

* Dropped the stream_iter argument from the HTTP functions
* The data argument is now either a string or a file like object that has a length attribute
* Rewrite the upload code and move it to a different file

Don't upload images if there is a connection problem." Z:/Documents/Bryan/Mijn documenten/Python/mwclient/trunk/mwclient/client.py

* Remove a debug statement

* decapitalize Site.Pages and similar
* Output more data if available in API errors

* Raise an ApiDisabledError if the API is disabled
* Properly fail on HTTPS sites

* Add expandtemplates