Merge pull request #44 from axsh/fix-empty-action-set

Allow empty ApplyAction to make it possible to drop packets using flows.
Merge pull request #45 from axsh/fix-missing-metadata-match

Added missing metadata fields to match
delete unused files
fix issue #47
- remove unnecessary ntohs.
Merge pull request #46 from axsh/fix-missing-namespace

Fixed ambiguous use of namespace in the C code and namespace collision issue with Timer
Merge branch 'axsh-edge' into wakame-edge