 Merge branch 'changelog_oreilly' into 'master'
 Merge branch 'changelog_oreilly' into 'master'

Changelog O'Reilly

added "Better API for access_levels" sponsorship from O'Reilly to CHANGELOG

8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/rubyconfau2015-sadr,8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/eurucamp2014-htdsadr