Merge pull request #78 from KazumaKobayashi/master

Serviceにjoinを追加
Merge pull request #81 from KazumaKobayashi/master

pom.xml version up
Add ResponseFilter class.
Add filter. fixed #86
Add get friends url. Fixed #88
Fixed #83
Change initialize value. fixed #91
Remove friend objects. fixed #90
Add friend relating and friend related lists. fixed #89
Merge pull request #94 from KazumaKobayashi/friend

フレンド関係の追加
Merge pull request #95 from KazumaKobayashi/coordinate

バグ修正や必須機能の追加
Add method in DateUtil.
Fixed #96
Merge pull request #97 from KazumaKobayashi/expiretime

再発行時間を0分にした
Merge pull request #87 from KazumaKobayashi/develop

ResponseのContent-Typeにapplication/jsonを設定するフィルターの追加など