NonBlockingJsonParser implements ByteBufferFeeder

[kptfh]

Should fix #478

[kptfh]

@cowtowncoder Shouldn't it hit performance?

[cowtowncoder]

Before considering adding one specific layer of wrapping, I would want actual performance measurements to show it does not hurt performance. Based on past experience I would expect going via ByteBuffer to add measurable amount of overhead (work was with aalto-xml).

[pjfanning]

This is probably unnecessary now due to #795 - that latter PR adds dedicated byte buffer support as opposed to changing the byte array support to support buffers and arrays.

[cowtowncoder]

Agreed @pjfanning, closing.