pyloxi: fix invalid reference to ofp from inside pyloxi
pyloxi: add tests for parse_message
pyloxi: fix OF 1.1+ experimenter message parsing
pyloxi: fix OF 1.1+ flow mod parsing
pyloxi: hardcode OF 1.3 multipart message subtypes

These should eventually be generated from the IR.
Merge pull request #31 from rlane/parse-of13

pyloxi: fix message parsing for OF 1.1+