Documentation Update for Ubuntu 16.04

[justinwray]

The project documentation needs to be updated to replace Ubuntu 14.04-specific instructions with Ubuntu 16.04-specific instructions. Additionally, any mention of support for 14.04 needs to be changed to 16.04.

[justinwray]

The Quick Setup guide has been updated.

[stevcoll]

@justinwray All documentation should be updated to reflect the move to 16.04. Additionally, the manual installation walkthrough in the production installation guide has been revamped to match the new provision process.