add known issues to 0.3.1 changelog

Author: MoralCode

CHANGELOG.md

@@ -4,6 +4,9 @@
 - Improved interactions with Auth0 management API by using higher level HTTP libraries and correcting the URL path for accessing the API
 - updated role checking for protected endpoints to be a little more robust and more reliably parse the data from the management API
 
+Known issues:
+- Will not start up if environment variables are quoted.
+
 ## 0.3.0
 - Introduce database migrations using flask-migrate.
 - Introduce crude soft-deletion