PYCBC-103: Pure C API Rewrite

Change-Id: Ib71a9cd7bdf28c1d29daa0188ad2d66be38bca66
Reviewed-on: http://review.couchbase.org/26234
Tested-by: Mordechai Nunberg <mnunberg@haskalah.org>
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>
Reviewed-by: Mordechai Nunberg <mnunberg@haskalah.org>