Merge pull request #16 from ScrumPBL/takeda_day2

Takeda day2
さいしんか
さいしんか２
Merge pull request #17 from ScrumPBL/dev_ishimura_2

Dev ishimura 2
Merge pull request #19 from ScrumPBL/takeda_day2

Takeda day2
add ranking view (not working)
Merge pull request #20 from ScrumPBL/ranking_view_miz

add ranking view (not working)
add tans view by click main view to ranking.
login→SignUp画面遷移完了
SignUpロジック処理完了
SignUp→MainMenu画面遷移完了
Merge pull request #21 from ScrumPBL/test_temporary

login→SignUp画面遷移完了
ranking is working!!
Merge pull request #22 from ScrumPBL/ranking_view_miz

Ranking view miz
Login、SignUp処理の修正（User Staticメソッド実装）
Merge pull request #23 from ScrumPBL/komatsu_1015

Login、SignUp処理の修正（User Staticメソッド実装）
Login、SignUpにヒント実装
Merge pull request #24 from ScrumPBL/komatsu_1015

Login、SignUpにヒント実装
ログイン処理修正
Merge pull request #25 from ScrumPBL/komatsu_1015

ログイン処理修正
Merge pull request #26 from ScrumPBL/takeda_day2

Takeda day2
fixed switch recommend and ranking.