Added "to" and "fro" to Node class for quick manual traversal
Added "to" and "fro" to Node class for quick manual traversal

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