Finally: dock your Unity launcher at the bottom of your desktop!

This makes me so incredibly happy!

Here's how...

First, start with a fully up-to-date Ubuntu 16.04 LTS desktop.

sudo apt update
sudo apt dist-upgrade -y

Then, install dconf-editor.

sudo apt install -y dconf-editor

Launch dconf-editor and find the "launcher" key and change it to "bottom".

dconf-editor

For good measure, I triggered a reboot, to make sure my changes stuck.  And voila!  Beauty!

:-Dustin