JDK-8067661: transferTo proposal for Appendable

[Patrick Reinhart]

Finally did some review with Alan and integrated all into this webrev:

http://cr.openjdk.java.net/~reinhapa/reviews/8067661/webrev.01 <http://cr.openjdk.java.net/~reinhapa/reviews/8067661/webrev.01>

-Patrick

> Am 08.11.2017 um 00:03 schrieb Brian Burkhalter <brian.burkhalter at oracle.com>:
> 
> Hi Patrick,
> 
> On Nov 7, 2017, at 3:01 PM, Patrick Reinhart <patrick at reini.net <mailto:patrick at reini.net>> wrote:
> 
>> I integrated your changes into my current version which I will look into tomorrow with Alan at Devoxx. I think adding some implementation note on the default method implementation will be needed to review later on…
> 
> I concur.
> 
>> I also made an override on the CharBuffer, where we need to add a enhanced documentation for the specialties around the CharBuffer implementations (BufferOverflowException/ReadOnlyBufferException), where a review of some native english speakers would help :-)
> 
> Sounds good!
> 
> Thanks,
> 
> Brian