Opened 0.2.2 and 0.3.0 TODO item.
Reassigned the PR about IPv4 and IPv6 class patch.

See https://github.com/trema/trema-edge/pull/22#issuecomment-24717877
New ticket for the simple_router refactoring issue.

See https://github.com/trema/pio/issues/1
TODO を更新
ICMP フォーマットのメモを追加
TODO を更新
Don't explicitly require rspec helper in each spec
Comply with RubyGems naming conventions.
TODO を更新
Merge branch 'develop' of github.com:trema/pio into develop

Conflicts:
	pio.org
IP -> IPv4Address class.
Version bump.
Merge branch 'release/0.2.2'