Update ChangeLog for release 3.0.20170713
Update ChangeLog for release 3.0.20170713

Change-Id: I099a7e525c0257bdff55a2a50ab4ac6b220a88df

wikimedia/pywikibot-core,magul/pywikibot-core,magul/pywikibot-core,wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core