leleuj/pac4j — pull request #55 by patou (2014-05-20 10:06:44+00:00)
Title: Allow to subclass Client

Allow to subclass a client like FormClient, but get the client as it with :
```
Clients.findClient(FormClient.class);
```
You can also get the first oauth client with :
```
Clients.findClient(BaseOAuth20Client.class);
```