Changes.txt

This is a modified version of the original Oberon System downloaded from
http://www.projectoberon.com/ (files inner.zip and outer.zip) on 2020-01-13

Here are the names, sizes and dates of the original files
(ordered by date):

18662 Nov 28  2018 Texts.Mod
33377 Mar 27  2017 TextFrames.Mod
 8355 Jul  5  2016 Display.Mod
15665 Jun 19  2016 System.Mod
 9361 Apr 10  2016 Modules.Mod
 8064 Nov 29  2015 Edit.Mod
12709 Nov 29  2015 Oberon.Mod
10257 Feb  4  2014 Kernel.Mod
 7065 Nov 29  2013 Viewers.Mod
 2803 Nov 29  2013 Input.Mod
 8164 Nov 29  2013 MenuViewers.Mod
13002 Nov 29  2013 FileDir.Mod
16900 Nov 29  2013 Files.Mod
 4249 Nov 29  2013 Fonts.Mod

Modifications:
- renamed all files from *.Mod.txt to *.Mod
- changed windows to unix line endings in all files
- Kernel, FileDir, Files, Modules, Input and Display
  modified as DEFINITION and removed unused members
- partially re-implemented Fonts.Mod to avoid SYSTEM.GET/SET 
  and pointer arithmetics
- it works to some extent in the Oberon IDE, debugging still required
- removed Kernel.GetSector, modified signature FileDir.EntryHandler,
  changed System.List accordingly
- Replaced all instances of LONGINT by INTEGER

Goal: 
Test case for Oberon to LuaJIT bytecode compiler, IDE
and source level debugger, see https://github.com/rochus-keller/Oberon