Update README

Signed-off-by: Taylor Smock <smocktaylor@gmail.com>

README.md

@@ -9,7 +9,25 @@ This plugin brings RapiD information into JOSM.
 
 ## Installation
 
-To use this plugin, [install JOSM](https://josm.openstreetmap.de/wiki/Download) and then [in the preferences menu install the **rapid** plugin](https://josm.openstreetmap.de/wiki/Help/Preferences/Plugins#AutomaticinstallationviaPreferencesmenu) **not currently in the JOSM plugin menu (TODO)**
+To use this plugin, [install JOSM](https://josm.openstreetmap.de/wiki/Download) and then [in the preferences menu install the **rapid** plugin](https://josm.openstreetmap.de/wiki/Help/Preferences/Plugins#AutomaticinstallationviaPreferencesmenu)
+
+## Usage
+1. Open JOSM
+2. Install the plugin ("JOSM Preferences" -> "Plugins" -> "rapid")
+3. Download data ("File" -> "Download Data") or just use the "Download data" button on the toolbar
+4. Download RapiD data ("Data" -> "RapiD")
+5. Switch to the "RapiD" layer (if you don't have one, file a bug report with the location)
+6. If you are in a location where Facebook has run its AI, *or* Microsoft has provided building footprints, you should see data. If you do not, check your paintstyles (some paintstyles make buildings *really* hard to see).
+
+### Optional JOSM Setup
+1. Open JOSM
+2. Add the "RapiD" paintstyle by going to "Map Settings" -> "Map Paint Styles" -> the plus sign next to "Active styles" -> enter `https://gitlab.com/smocktaylor/rapid/raw/master/src/resources/styles/standard/rapid.mapcss` in the "URL / File" field.
+
+## Information
+* [RapiD](https://mapwith.ai/rapid)
+* [HOT Tasking Manager + RapiD] (https://tasks-assisted.hotosm.org/)
+* [RapiD source code and country requests](https://github.com/facebookincubator/RapiD)
+* [mapwith.ai](https://mapwith.ai/)
 
 ## Contributing