add 1.6 to travis

Author: l3pp4rd

.travis.yml

@@ -5,7 +5,7 @@ go:
   - 1.3
   - 1.4
   - 1.5
-  - release
+  - 1.6
   - tip
 
 script: go test -race

statement_test.go

@@ -1,12 +1,12 @@
+// +build go1.6
+
 package sqlmock
 
 import (
 	"errors"
 	"testing"
 )
 
-// +build go1.6
-
 func TestExpectedPreparedStatemtCloseError(t *testing.T) {
 	conn, mock, err := New()
 	if err != nil {