Updated LICENSE file and added AUTHORS file

Author: wnienhaus

AUTHORS

@@ -0,0 +1,23 @@
+E-mail addresses listed here are not intended for support.
+
+py-esp32-ulp authors
+--------------------
+py-esp32-ulp is written and maintained by Thomas Waldmann and various contributors:
+
+- Thomas Waldmann <[email protected]>
+- Wilko Nienhaus <[email protected]>
+
+Assembler
+---------
+py-esp32-ulp is an assembler toolchain for the ESP32 ULP (Ultra Low-Power)
+Co-Processor, written in MicroPython.
+Copyright 2018, Thomas Waldmann <[email protected]>, licenced under the terms
+of The MIT License (MIT).
+
+Preprocessor
+------------
+py-esp32-ulp includes a preprocessor for handling ``#define`` statements in
+source, and for expanding RTC convenience macros in a way that mirrors what the real
+ESP-IDF macros do.
+Copyright 2021, Wilko Nienhaus <[email protected]>, licenced under the terms
+of The MIT License (MIT).

LICENSE

@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) 2018 Thomas Waldmann
+Copyright (c) 2018 Thomas Waldmann (see AUTHORS file)
+Copyright (c) 2021 Wilko Nienhaus (see AUTHORS file)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal