TranscoderPP Additions

- Use 'ensure_ascii=False'
- Utilize 'FMT_AUTO'

Change-Id: Ibd3f20fa4d20d776daef241b7fb93e0cbb0d6525
Reviewed-on: http://review.couchbase.org/29775
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>