Improve documentation and Play store page

[PhilippC]

create a new video for play store introduction, create some instruction videos, add translations to play store page

[Small-Ku]

Hong Kong Google Play page of Keepass2Android is using Simplified Chinese version now. Please consider about the Traditional Chinese one instead because it is more commonly used in Hong Kong. It would be better for Hong Kong people.

Simplified forms of certain characters are used in mainland China, Singapore, and Malaysia; the corresponding traditional characters are used in Taiwan, Hong Kong, Macau, and to a limited extent in South Korea.

Above sentence quote from Chinese characters in Wikipedia

[WebworkrNet]

#2193