 Merge branch 'attribution-for-shell-guide' into 'master'
 Merge branch 'attribution-for-shell-guide' into 'master'

Attribution For Shell Guide

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