Update config.json, index.md and fix typo in jp 2.1.0
Update files related to accelerometer and also files of jp 2.1.0
Update files realated to camera, compass, connection, and device. Also, fix some files of jp 2.1.0
Update files related to events
Update files related to file, geolocation, media, notification, and storage
Update files under guide, fix typos in previous version and en docs
Translate files that newly created in 2.2.0