integration: Initial implementation.

This introduces a new package to house tests which use the rpctest
package to programmatically drive end-to-end integration testing and
move the existing RPC integration tests into the new package.

integration/README.md

@@ -0,0 +1,14 @@
+integration
+===========
+
+[![Build Status](http://img.shields.io/travis/btcsuite/btcd.svg)]
+(https://travis-ci.org/btcsuite/btcd) [![ISC License]
+(http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org)
+
+This contains integration tests which make use of the
+[rpctest](https://github.com/btcsuite/btcd/tree/master/rpctest) package to
+programmatically drive nodes via RPC.
+
+## License
+
+This code is licensed under the [copyfree](http://copyfree.org) ISC License.

integration/main.go

@@ -0,0 +1,8 @@
+// Copyright (c) 2016 The btcsuite developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package integration
+
+// This file only exists to prevent warnings due to no buildable source files
+// when the build tag for enabling the tests is not specified.

integration/rpcserver_test.go

@@ -5,7 +5,7 @@
 // This file is ignored during the regular tests due to the following build tag.
 // +build rpctest
 
-package main
+package integration
 
 import (
 	"bytes"