Behaviour of @XArgsConstructor when its placement makes no sense (i.e. when annotating an interface with them) is no longer 'throw weird errors', but has been brought in line with the others: A nice error message is generated.
Fixes issue #175
Also updated @Getter and @Setter's documentation to explain their new class-level feature, and updated @Data's description to highlight how @Data is now truly nothing more than the combination of @RequiredArgsConstructor, @EqualsAndHashCode, @ToString, @Getter, and @Setter.