Synchronizes this preface version with idx-doc report version
Synchronizes this preface version with idx-doc report version

edx/edx-analytics-dashboard,Stanford-Online/edx-analytics-dashboard,edx/edx-analytics-dashboard,edx/edx-analytics-dashboard,Stanford-Online/edx-analytics-dashboard,Stanford-Online/edx-analytics-dashboard,Stanford-Online/edx-analytics-dashboard,edx/edx-analytics-dashboard