Updating javadoc linking to Java SE 7
Cleaning up examples for doc
407470 - Javadoc for @OnWebSocketFrame incorrectly references WebSocketFrame object

+ Simple javadoc change, code already uses Frame, not WebSocketFrame.
407469 - Method parameters for @OnWebSocketError should support Throwable

+ Simple javadoc fix, code already uses Throwable.
Adding more websocket servlet examples