Install aztk sdk to the node

[jafreck]

Currently, we upload the aztk directory to the node. It would be best if we install it and it's dependencies to the node.

We would need to refactor setup.py since that currently have cli specific code in it. Possibly break into 2 setup.pys: one for the cli which depends on another for the SDK (this might require 2 pip packages).

With the SDK installed, we can use it instead of node_scripts, and remove duplicate code