Update bundled gems.
Merge pull request #83 from trema/feature/bundle

Update bundled gems.
Update inch.
Do not use the immediate value 0 (OFPT_HELLO).
Add tests of pio/open_flow/type.rb.
Merge pull request #84 from trema/feature/refactor_hello

Do not use the immediate value 0 (OFPT_HELLO).
Merge branch 'develop' of https://github.com/trema/pio into new_dhcp

Conflicts:
	pio.gemspec