title: Blob or BYTEA from Plain SQL Query in Slick 3.0.0
body: <p>I am trying to return a BLOB from a Postgres 9.4 database using Slick 3.0.0</p>
  
  <p>My simple attempt is  </p>
  
  <p><code>import slick.driver.PostgresDriver.api._
  import slick.jdbc.JdbcBackend.Database
  import scala.concurrent.Await
  import scala.concurrent.duration._
  import scala.concurrent.ExecutionContext.Implicits.global
  </code></p>
  
  <pre><code>object QueryRunner extends  App {
  val db = Database.forURL("jdbc:postgresql://localhost:5432/test","test_migration","test_migration",driver = "org.postgresql.Driver")
  
  def selectRegions = sql"Select region_data from test.regions".as[java.sql.Blob]
  val result = db.run(selectRegions)
  val regionData = Await.result(result,1.seconds)}
  </code></pre>
  
  <p>That returns me</p>
  
  <p>Error:(16, 65) could not find implicit value for parameter rconv: slick.jdbc.GetResult[java.sql.Blob]
    def selectRegions = sql"Select region_data from core.regions".as[java.sql.Blob]</p>
  
  <p>I feel as though since Blob and BYTEA are somewhat specialized that I must be missing an import?</p>