Matplot lib needs additional data files, see
http://www.py2exe.org/index.cgi/MatPlotLib .
Update readme with packaging tips for Windows.
Merge pull request #1 from hsorby/master

Zinc visualisation, Py2exe and NSIS
Merge commit '05237988ac07e5ee3c45b62400562e82dda182dc'
Updated dynamic model, corresponds to d42755bdfc7b in Hg at
http://models.cellml.org/workspace/178.  One variable (Px) is way of the
scale compared to other variables, so plot isn't much use at the moment.
Merge pull request #2 from codecurve/master

Changes to pH model