Pulls in the source of a BSD licenced base64 implementation that is 5x f...

...aster than the Apache one for our usage

Overall increase in performance in a benchmark reading some Lzo B64 line encoded data was a 50% faster. The Base64 component is ~ 5x

yes. we don't have control on first copy.
we have to do the second copy here since the array that backs Text is almost always longer than the length the line itself.