Used generic paths for ETL_Setup
Added instructions on setting-up ETL_Setup
Added "City of Chicago" to author
Added toctree for proper display in RTD
Documentation: Noted that the e-mail integration is with SMTP servers, not just Exchange.
Documentation: Changes to installation-configuration.rst.  Mostly proofreading/editing but added content in a couple of places.
Merged in dev to pick up some old changes. Had to manually resolve conflicts in docs/index.rst and docs/installation-configuration.rst.