Add license file

Change-Id: I501062899105f987c6597a8cda098453223158a3

README.md

@@ -4,7 +4,24 @@ edX Analytics API Server
 See https://edx-wiki.atlassian.net/wiki/display/AN/Analytics+Data+API for more details. For the API *client* visit
 https://github.com/edx/edx-analytics-api-client.
 
-Running Tests
+License
+-------
+The code in this repository is licensed under version 3 of the AGPL unless otherwise noted.
+
+Please see `LICENSE.txt` for details.
+
+Testing
 -------------
 
 Run `make validate`.
+
+Development
+-------------
+
+1. Install dependencies:
+
+        $ make develop
+
+2. Launch server:
+
+        $ ./manage.py runserver