Updated python modules for Windows installer

The functionality of PyNcView has not changed with this release - but the included python modules in the Windows installer are up to date - as of 2017-02-24.

This is only a pre-release for the following reasons: 1) mpl_toolkits is disabled in the Windows installer (due to un-solved import error), 2) the update to Matplotlib version 2 gives some errors/warnings, 3) the Windows installer has not been sufficiently tested on Windows 32bit systems.

As for 1) - we will work on that.

As for 2) - we will fix that

As for 3) - please report any issues

SF to GitHub transfer

This release is mainly about moving the official PyNcView repository from SourceForge to GitHub.

The Windows binary installer is a copy of the one from SourceForge - which is quite old.

Shortly we will provide a pre-release of an updated Windows binary installer.