BREAKING CHANGE

Change 3 WebSocketService methods:

```
void messageToAll(String pluginUri, String message)
->
void sendToAll(String message)
```

```
void messageToAllButOne(HttpServletRequest request, String pluginUri, String message)
->
void sendToAllButOrigin(String message)
```

```
void messageToOne(HttpServletRequest request, String pluginUri, String message)
->
void sendToOrigin(String message);
```

Besides the 3 new method names note that both the "request" and "pluginUri" arguments are not needed anymore. This is now automatic.

1 new WebSocketService method:

```
void sendToSome(String message, Predicate<WebSocketConnection> connectionFilter)
```

You can decide to which connections to send the message by providing a predicate function (use a lambda) that decides per connection.