pomsets-gui 1.0.5 released

[michael j pan]

http://www.pomsets.org/Release/pomsets-gui-1.0.5

With this release, we have completely migrated from wx to PyQT, and so
the binaries will be smaller and the installation process easier.

Changelog:
* remove dependency on zgl (and transitively, FTGL, sippy-ftgl, wx)

This release requires the pomsets-core 1.0.4, which was previously
released on 15 March.