Merge pull request #5 from fredrikt/master

pylint happiness
documentation and minor cleanup
de-lint
import cleanup
pep8
pep8
more pdp8 and minor cleanup
api that tries to avoid wrapping attacks

also a test
attempt simple wrapping attack
wording
be really picky
default to oid unless X509_CODE_MAP contains an entry

with test using haka signing certificate
cut 0.9
prep 0.10
more careful pem parsing
NEWS.txt
prep 0.10.1dev
cert normalization
travis ci
rename