Add NOTICE file, make clear files that were ported from the stdlib

NOTICE

@@ -0,0 +1,8 @@
+ffjson
+Copyright (c) 2014, Paul Querna
+
+This product includes software developed by 
+Paul Querna (http://paul.querna.org/).
+
+Portions of this software were developed as
+part of Go, Copyright (c) 2012 The Go Authors.

pills/iota.go

@@ -1,3 +1,21 @@
+/**
+ *  Copyright 2014 Paul Querna
+ *
+ *  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.
+ *
+ */
+
+/* Portions of this file are on Go stdlib's strconv/iota.go */
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

pills/jsonstring.go

@@ -15,6 +15,11 @@
  *
  */
 
+/* Portions of this file are on Go stdlib's encoding/json/encode.go */
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package pills
 
 import (