Implement latest version check

[kbaley]

Since only the latest version of a tool is supported, the TimeoutMigrationTool tool should have latest version check functionality like Particular.AzureTable.Export does.

[kbaley]

Related issues:

• Azure Service Bus Implement latest version check NServiceBus.Transport.AzureServiceBus#461
• SQS Transport Implement latest version check NServiceBus.AmazonSQS#1212
• SQL Persistence Implement latest version check NServiceBus.Persistence.Sql#853
• Timeout Migration Tool Implement latest version check #328