Revert "updated socket.io version in order to have this working on node > 0.10"

This reverts commit 405ea3f1b5555ee2e233e4b8ea8deaf8ccde637a.
Revert "Revert "updated socket.io version in order to have this working on node > 0.10""

This reverts commit 29005bf6e5857832cc7b1646df2340297ec98da2.
Revert "Revert "Revert "updated socket.io version in order to have this working on node > 0.10"""

This reverts commit 1cb67c4c4272c85f41a425230cee4a37db2a0d38.