Added et.json(Estonian)
#270 Added 1000 common words for Estonian Language. Source from where data is obtained : https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists/Estonian_wordlist
#270 Added 1000 common words for Estonian Language. Source from where data is obtained : https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists/Estonian_wordlist