Merge pull request #41 from tonyroberts/develop

merge changes to get npython working again on windows
fixes #39
Move everything from pythonnet folder to root folder

Main reason is that setup.py should be in root.
Make CI work with setup.py in root folder
Merge pull request #42 from pythonnet/movethingstorootfolder

Move things from the pythonnet folder to root
Update paths in .gitignore