Utilities: Fix dview remove message
RC-241 MaxValuation on MeasureSetInfo now being hard coded to $20
tweaks to measures page
Merge branch 'MayRelease' of https://github.com/RareCrowds/OpenAdStack into MayRelease
Delivery Network Exporters: Cleanup/refactor for consistency
 * Refactor Campaign, AdUnit and Creative exporters for consistency
 * Cleanup/better utilize DeliveryNetworkContentExporterBase
 * Use full entity heritage for configs and content definitions
 * Option to disable embedded default content definitions via config settings