-Adds script to check S3 location for ingest csvs, trigger ingest, and move to outbox if found
-Adds check for number of concurrent MarsIngests allowed to MarsIngestsController#create
-Adds 'completed' flag for MarsIngest to signal that all items are complete
-Adds check for MarsIngest#in_progress? in MarsIngestItemJob after_perform and rescue_from to mark ingest as completed when all items have either failed or succeeded
-Adds script to check S3 location for ingest csvs, trigger ingest, and move to outbox if found -Adds check for number of concurrent MarsIngests allowed to MarsIngestsController#create -Adds 'completed' flag for MarsIngest to signal that all items are complete -Adds check for MarsIngest#in_progress? in MarsIngestItemJob
after_performandrescue_fromto mark ingest as completed when all items have either failed or succeeded