simpleRouterリファクタリング
Merge branch 'devel' of https://github.com/ttsubo/ryu into devel

Conflicts:
	ryu/original/ryu_app/rest_simpleRouter/simpleArp.py
	ryu/original/ryu_app/rest_simpleRouter/simpleRouter.py
simpleRouterリファクタリングを継続