updating README

* added license details (and pointer to LICENSE file)
* added screenshot
* added extra verbiage

README.md

@@ -1,9 +1,32 @@
 RideLogicAVLS
 ===
 
+RideLogic Automatic Vehicle Location System (AVLS)
+
 **THIS CODE IS CURRENTLY EXPERIMENTAL**
 
-RideLogic Automatic Vehicle Location System
+![RideLogic AVLS Sample Screenshot](img/RideLogicAVLS_screenshot.png)
 
+Overview
 ---
 
+This project is the front end for providing the automatic vehicle location
+system.
+
+The web application parses a protobuf real-time GTFS feed to show current
+locations of buses.
+A Geojson file is used to create the appropriate routes for a particular transit
+agency.
+
+Routes can be selected to filter displayed buses.
+
+Currently this project is a **work in progress**.
+
+License
+---
+
+Unless otherwise stated, all source code is copyright Clementine Computing LLC
+and is provided under an AGPL3.0 license.
+
+See the [LICENSE](LICENSE) file for details.
+