Improved README.md

[jakubpawlina]

• [x] Included a screenshot showing after the changes.
• [x] Included a description of the change below.
• [x] Related to some issue.

Description

Improved README.md file:

• added links to repositories and ordered in points
• added screenshot from website
• added link to FOSSASIA website
• added "How to get geolocation" section
• added link to GCI18 Fossasia website
• updated description saying which website supports it no
• small fixes added

Fixes: #18

Screenshot after changes

[abishekvashok]

I would be glad if you could relate this to some issue

[jakubpawlina]

@abishekvashok done. I have also expanded that for the remaining points

[jakubpawlina]

@abishekvashok done

[abishekvashok]

Thanks