Ascii Art Graphs [bugfixes]

This release has a first attempt at terminal graph support - very simple graphs work in terminal mode!
You can use F10 or /Graph to try it out.

This release fixes three crashes:

• If you used a very long multiline formula, trying to edit it with F2 would crash.
• Opening a worksheet with /File/Retrieve, then using /Tools/DOS (or a macro with {SYSTEM} in it), would make displaying graphs crash.
• Attributes could get desynchronized during block copies, this didn't crash but could make the colors wrong.

If there are any crashes or visual glitches - please report them, even a screenshot is useful.

To install:

1. Navigate to your ~/.dosemu/drive_c/123R4D directory.
2. Backup your file L13VCGAF.DLD.
3. Overwrite it with L13VDEMU.DLD. That's it!

# backup old driver
$ cp L13VCGAF.DLD L13VCGAF.BAK
# install new driver
$ mv L13VDEMU.DLD L13VCGAF.DLD 

When this is closer to being a final release, I'll make a nice installation package!

Testing Release 0.3

This is a testing release, it mostly works for me, I'm really using it, but there are some known bugs.

• I think trying to switch to graphical mode (e.g. pressing F10, or using /Graph) will crash, printing a graph should work though.
• If you try to use /Tools/DOS, it will crash when you exit. This includes if you use a macro that uses {SYSTEM}.

I know about these bugs, and working on it!

If there are any other crashes or visual glitches - please report them, even a screenshot is useful.

To install: backup your file L13VCGAF.DLD, and overwrite it with L13VDEMU.DLD. That's it.

When this is closer to being a real release, I'll make a nice installation package!