use seterr to ignore warnings in constraints solver and wrap_bounds
fix: remove extra bin from lorentzian histogram, suppress AccuracyWarning;
fix: remove PIL dependency for examples; fix: numpy/sympy install for python2.5;
set zip_safe=False


git-svn-id: svn+ssh://svn.mystic.cacr.caltech.edu/mystic/mystic@721 968178ea-60bd-409e-af13-df8a517b6005
Merge branch 'master' of https://github.com/uqfoundation/mystic