Add EU cookie law support

I have created a fork at https://github.com/javiertury/nk-google-analytics/

I have added 2 options, cookieless tracking and anonymize ip. I have even added a new tab called “EU Cookie Law”, however when I test the plugin I can’t switch tabs. As a workaround I get rid of “display: none;” under “.nk-tab-content” but then all of the tabs display at the same time.

The functional part has been tested and works. I just need to fix the tabs behaviour before merging.

Please could you help me fix this issue with the tabs?

https://ww.wp.xz.cn/plugins/nk-google-analytics/