dded license and binary for cygwin/windows64

 # PILOOP
-Linux/Unix command to calculate pi in a forever loop, thereby maxing out the CPU
+CygWin/Linux/Unix command to calculate pi in a forever loop, thereby maxing out the CPU
 cores of the machine. You need to specify the number of concurrent threads, and
 optionally the priority of the process by specifying a nice value to add.
 
@@ -61,4 +61,11 @@ The pre-compiled piloop file in the repository is compiled for
 piloop: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, 
 interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, 
 BuildID[sha1]=5312cb7d4bc2fab8851badf5ef36ddd91ce2136a, not stripped
-```
\ No newline at end of file
+```
+
+The pre-compiled piloop.exe file in the repository is compiled for
+```
+piloop.exe: PE32+ executable (console) x86-64, for MS Windows
+```
+and requires a CygWin x64 installation. The provided cygwin1.dll can be used to run only piloop.exe. 
+Please note that CygWin is under a different license (https://cygwin.com/licensing.html).
\ No newline at end of file

+/************************************************************************************************
+* All code in this file is under the MS-RL License (https://opensource.org/licenses/MS-RL)      *
+* By using the code in this file in any way, you agree to the above license terms.              *
+* Copyright (C) LIGHTS IN LINE AB (https://www.lightsinline.se)                                 *
+* Repository, Wiki, Issue tracker and more at https://git.lightsinline.se/lilchger/piloop       *
+*                                                                                               *
+* Author: Christian Gerdes (christian.gerdes@lightsinline.se)                                   *
+* Contributors                                                                                  *
+* LIGHTS IN LINE AB                                                                             *
+* SWEDBANK AB                                                                                   *                                                                                 *
+************************************************************************************************/
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>