* upgrade for windows on travis
* Install python on travis windows, update readme, update tests
* update readme, travis config and clean code
* install python inside cibuildwheel run
* use register to get python path
* fixes from review
* fix pip version
* use nuget for instal python
* clean code
* Update cibuildwheel/windows.py
Co-Authored-By: Joe Rickerby <joerick@mac.com>
* fixes from review
* Final bits of tidy up
