Update AUTHORS: update authors to better reflect contributions and works

Author: Andy C

AUTHORS

@@ -1,6 +1,8 @@
 See a list of contributors here
+===============================
+ Original/Modified work: Copyright (C) 2017-2020 LinxGem33 (Andy C)
+ Original/Modified work: Copyright (C) 2019-2020 Andrew Zaech
+ ==============================
  Original work: Copyright (C) 2015 Giovanni Campagna
  Modified work: Copyright (C) 2016 Zorin OS
- Modified work: Copyright (C) 2017 Alexander Rüedlinger
- Original/Modified work: Copyright (C) 2017-2020 LinxGem33 (Andy C)
- Original/Modified work: Copyright (C) 2019-2020 Andrew Zaech
+ Modified work: Copyright (C) 2017 Alexander Rüedlinger