Adding images to a page

• Add directory -img in root of directory containing current *.lang.md file.
• jpg, png, webp and gif images are supported.
• jpg and png images will be converted in webp one.
• webp will be compressed.
• gif will be copied as is.

![alt text](-img/stasige.gif)
![Jpg image](-img/stasige.jpg)
![jpgPng image](-img/stasige.png)