Add gem 'sinara-partial'.
Add Elastic Load Balancer page in EC2 Summary using partial (typed erb).

画面の一部のみ。
Elastic Load Balancerの一覧を取得する処理は未実装。
Implemented get information of  Elastic Load Balancer
Merge pull request #20 from betahikaru/feature/support-lb-#15

Support Elastic Load Barancer