Add with-python option to Ice 3.5 dependency in the OMERO formula

With recent changes to the upstream ice Formula, `--with-python` now
needs to be specified to include the Python bindings.
Add with-python to Ice 3.5 dependency in the OMERO 4.4.x formula
Merge pull request #58 from sbesson/ice_python

Add with-python option to Ice 3.5 dependency in the OMERO formula