basic OSX build of cpp-ethereum, simplejson instead of ast
basic OSX build of cpp-ethereum, simplejson instead of ast

chfast/ethereum-buildbot,chfast/ethereum-buildbot,vaporry/ethereum-buildbot,ethereum/ethereum-buildbot,ethereum/ethereum-buildbot,chfast/ethereum-buildbot,ethereum/ethereum-buildbot,vaporry/ethereum-buildbot,vaporry/ethereum-buildbot