planning/timeline/timeline.2013.xls: moved Flatten the datasources to a common schema under Datasource validations because the query left-joining the tables is needed for validation, and it is much easier to validate datasources when there is only one input table to validate
planning/timeline/timeline.2013.xls: moved Flatten the datasources to a common schema under Datasource validations because the query left-joining the tables is needed for validation, and it is much easier to validate datasources when there is only one input table to validate