PYCBC-137: partial PEP-8 conformance

- Some files, like 'params.py' will never be strictly PEP-8 conformant
  as it does not make sense to keep large tables and confine them to
  visually unappealing rules (e.g. extra whitespace after '=').

All in all, 'pep8' issues a lot less warnings now

Change-Id: I5ef027413b72cc3824444dfbe7e3e2a985221b9f
Reviewed-on: http://review.couchbase.org/26983
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mordechai Nunberg <mnunberg@haskalah.org>