1. Provided SetATSHostList() API for changing the ATS address dynamically
2. Not using CASA enabled server as ATS. ATS address has to be explicitly set
in client.conf or through SetATSHostList()
3. Not normalizing CASA enabled server's host name while obtaining CASA tokens.
Callers of ObtainAuthTokenEx() have to pass normalized name as argument
to be able to deliver the client component onto distributions targeting
desktops without having to deliver the server components. This commit is
for the resulting client project.
