Adds "toRep[A]" syntax with import Rep._ to provide the ability to take a naked type and lift it into its Rep if it matches. eg.

scala> "123".toRep[Int]
res2: Option[com.twitter.bijection.package.@@[java.lang.String,com.twitter.bijection.Rep[Int]]] = Some(123)

scala> "123a".toRep[Int]
res3: Option[com.twitter.bijection.package.@@[java.lang.String,com.twitter.bijection.Rep[Int]]] = None