Fix for a compiler issue on OSX ('value_type' is a private member of 'graphlab::discrete_domain::ConstIterator') which seems to be a LLVM bug (see http://llvm.org/bugs/show_bug.cgi?id=12240)
Merge pull request #121 from hstm/master

Fix for a compiler issue on OSX ('value_type' is a private member of 'gr...