Prepared for release

CHANGELOG

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+Release June 2017 (2017-06-12)
+------------------------------
+Documentation: correct authors in README (#148)
+Documentation: add new section about hosted database (#150)
+Database: add preliminary list of paid sources
+Database: add some ANZ's largest ISPs' web mail domains and search engine domains (Dodo, Telstra, Optus, 2degrees, iiNet, Virgin, Vodafone etc)
+Database: add various other search engines (SosoDesk - unrelated to Soso)
+Database: add Ukrainian search providers ukr.net and i.ua
+Database: add belarusian search provider tut.by
+Database: add kununu
+Database: add outlook.live.com to list of Outlook.com email referrers
+Database: add t.umblr domain to Tumblr
+Database: merge Chinese Soso search engine under Sogou
+Database: fix for ITU as it was incorrectly indented
+Database: remove duplicated domains e.g. Comcast
+Database: move Taboola and Outbrain from "unknown" section to paid sources
+Database: move some domains into alphabetical order