Bump version to v0.6.0-alpha

Bump version to v0.5.2-alpha

Bump version to v0.5.1-alpha

Make loader start at /switch/

Bump version to v0.4.1-alpha

Update nx again

Merge branch 'master' of https://github.com/nx-python/Pynx

Update to latest nx

Update to latest nx, Pynx -> PyNX

Merge pull request #1 from nx-python/dev3

Python 3