*: add missing package descriptions

This adds and updates package descriptions in etcd projects.
And also deletes some duplicate LICENSE statements.

pkg/wait/wait.go

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package wait provides utility functions for polling, listening using Go
+// channel.
 package wait
 
 import (

pkg/wait/wait_time.go

@@ -12,22 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/*
-   Copyright 2015 CoreOS, Inc.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
 package wait
 
 import (

pkg/wait/wait_time_test.go

@@ -12,22 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/*
-
-   Copyright 2015 CoreOS, Inc.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
 package wait
 
 import (