Point script to right binary location

Our node is at /usr/local/bin/node.
Have run script use current enironment

Do not clear the environment variables before trying to run Node.
This frees up the server admin to put binaries wherever needed. At this
point, Node must be in $PATH.
Change node-markup.sh shell to bash

/bin/sh can have different results on different machines. /bin/bash
does exactly what is necessary.
Merge branch 'new-binary-location'