Move REST* interfaces into pkg/api/rest

Dependency chain is now api -> api/rest -> apiserver.  Makes the
interfaces much cleaner to read, and cleans up some inconsistenties
that crept in along the way.

pkg/client/record/events_cache.go

@@ -17,10 +17,11 @@ limitations under the License.
 package record
 
 import (
+	"sync"
+
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 	"github.com/golang/groupcache/lru"
-	"sync"
 )
 
 type history struct {

pkg/client/record/events_cache_test.go

@@ -17,9 +17,10 @@ limitations under the License.
 package record
 
 import (
+	"testing"
+
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
-	"testing"
 )
 
 func TestAddOrUpdateEventNoExisting(t *testing.T) {