2019-06-03: TODO: Add "Geometry" controls to format dialog (global scale, offsets for labels and exed, scales for ticks)

2019-06-03: BUG: LoadBatch() does not close the source file after parsing.
UPD: There was a bug is in old LibV and it can not be fixed: pre-2000 LibV archives are lost.
I have tried to use nearest (2000-25-12) archive, found the bug, fixed it, compiled LibV,
changed identifiers in 'contour' according to new pascal unit, but:
a) still, parser code in 2000-25-12 are clumsy and buggy;
b) program hangs on start ...
I'll leave it as is. It's easier to implement all relevant code in pascal, without LibV calls.
In time, all old pascal software will be rewritten for FPC & Lazarus.
Or will be rewritten in C & FLTK from scratch.