Merge pull request #1 from codecurve/master

Update my fork to the latest?
Set layouts on main window widgets.
Creating ZincWidget widget class implementation.
Add spacer to ZincWidget group box and set minimum size.
Code tidy up.
Updates to README.md.
Adding resources for creating a windows executable using py2exe and an installer using NSIS.
Merge pull request #1 from hsorby/master

Zinc visualisation, Py2exe and NSIS