Upgrade production node version to v0.10.24
Upgrade production node version to v0.10.24

If the installed node version doesn't match the configured version, it
will be upgraded.

This also switches to using the pre-built binaries from nodejs.org,
which significantly reduces the install time for a new version of node.

mysociety/popit,mysociety/popit,openstate/popit,Sinar/popit,Sinar/popit,mysociety/popit,mysociety/popit,Sinar/popit,Sinar/popit,openstate/popit,openstate/popit,mysociety/popit,openstate/popit