Adding EMEA analytics provider Gemius

Gemius' CrunchBase profile (https://www.crunchbase.com/organization/gemius):
- website: https://www.gemius.com/homepage.html
- "international research agency"
- "expanded across the EMEA region and is now currently operating in more than twenty markets"

Example sites using Gemius:
- http://gemius.pl
- http://delfi.lt
- http://seznam.cz
- http://inbox.lv
- http://tsn.ua
- http://novinky.cz
- http://tvn24.pl
- http://24sata.hr
- http://sports.ru
- http://b92.net