installation: fall back to "nodejs" if "node" is not found (#22)
installation: fall back to "nodejs" if "node" is not found (#22)

On Ubuntu 14.04, the command "node" was renamed to "nodejs".

BBC-News-Labs/datastringer,ahmadassaf/Datastringer,ahmadassaf/Datastringer,BBC-News-Labs/datastringer,ahmadassaf/Datastringer,BBC-News-Labs/datastringer