Port "Managing Push Notificaitons" for Android (English)

一部番号付き箇条書きのナンバリングがおかしい箇所あり。
（あとで直す）
Merge branch 'master' of https://github.com/taro-m/kiidoc-demo
Port managing analytics page for JavaScript.
Port basic analytics page for JavaScript.
Port flex analytics page for JavaScript.
Port analyze application data page for JavaScript.
Port analyze-event-data page for JavaScript.
Port object storage page for JavaScript.
Port creating objects page for JavaScript.
Port retrieving objects page for JavaScript.
Port updating objects page for JavaScript.
Port deleting objects page for JavaScript.
Port querying objects page from JavaScript.
Port scoping objects page and remove push page for JavaScript.
Fix code style.
Remove redundant empty line.
Merge pull request #35 from shinsuke-nara/fix_code_style

Fix code style.
Merge pull request #36 from shinsuke-nara/object_storage

Port object storage section for JavaScript
Merge pull request #37 from shinsuke-nara/analytics

Port application analytics section for JavaScript