sympy/sympy — pull request #2029 by rpuntaie (2013-04-20 13:39:14+00:00)
Title: lxml instead of libxml2 for c2p

google app engine supports lxml and generally better supported
- the dependency is only in c2p, i.e. convert content mathml to representation mathml
- google app engine loader does not have get_data, so I added AttributeError to except...