adjust String+MD5.swift statement

Sources/String+MD5.swift

@@ -2,22 +2,29 @@
 //  String+MD5.swift
 //  Kingfisher
 //
-// To date, adding CommonCrypto to a Swift framework is problematic. See:
+//  Copyright (c) 2017 Wei Wang <onevcat@gmail.com>
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+// adding CommonCrypto to a Swift framework See:
 // http://stackoverflow.com/questions/25248598/importing-commoncrypto-in-a-swift-framework
-// We're using a subset and modified version of CryptoSwift as an alternative.
-// The following is an altered source version that only includes MD5. The original software can be found at:
-// https://github.com/krzyzanowskim/CryptoSwift
-// This is the original copyright notice:
 
-/*
-Copyright (C) 2014 Marcin Krzyżanowski <marcin.krzyzanowski@gmail.com>
-This software is provided 'as-is', without any express or implied warranty.
-In no event will the authors be held liable for any damages arising from the use of this software.
-Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
-- The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required.
-- Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
-- This notice may not be removed or altered from any source or binary distribution.
-*/
 
 import Foundation
 import CCommonCrypto