ACL groups are case-sensitive

[nathanperkins]

Issue

Google users are allowed to specify capitalization of the email login for their accounts (e.g, Nathan.Perkins@gmail.com). The usernames for Simian's ACL groups are case-sensitive. This can be a confusing bug if an admin enters users in lowercase, but Google expects capitalization.

How to replicate

1. Log in to Simian as admin and open the ACL groups config page.
2. If you have a user whose email login is stored on Google as First.Last@gmail.com, enter it as first.last@gmail.com.
3. Log out and log back in as First.Last@gmail.com
4. You will not have access.
5. Change the ACL entry to First.Last@gmail.com and log back in.
6. You will have access.