Fix README
Fix README

* Remove un-needed gem installs in favor of the bundle.
* Use db:setup vs. migrate.
Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples,Azure/azure-sql-database-samples