allow traversal filters to have either name or body supplied
allow traversal filters to have either name or body supplied

technige/py2neo,pombreda/py2neo,nicolewhite/py2neo,fpieper/py2neo,technige/py2neo,pombreda/py2neo,nigelsmall/py2neo,nicolewhite/py2neo,fpieper/py2neo,nigelsmall/py2neo,pombreda/py2neo,technige/py2neo,nicolewhite/py2neo,fpieper/py2neo