Resolve "User testing follow up (Documentation)"
Closes #203 (closed)
This adds a "walkthrough" to setup and run the system on a debian distro. Example here:
https://ghsc.code-pages.usgs.gov/users/bhawthorne/pdl/userguide/getting-started/walkthrough.html
cc @emartinez @ehunter @hhunsinger @khaynie @jdbrown @zcloutet @rking
Edited by Hawthorne, Bryan D