Move sexp into query

db/repl.go

@@ -25,11 +25,11 @@ import (
 
 	"github.com/google/cayley/config"
 	"github.com/google/cayley/graph"
-	"github.com/google/cayley/graph/sexp"
 	"github.com/google/cayley/quad/cquads"
 	"github.com/google/cayley/query"
 	"github.com/google/cayley/query/gremlin"
 	"github.com/google/cayley/query/mql"
+	"github.com/google/cayley/query/sexp"
 )
 
 func trace(s string) (string, time.Time) {