The internal GuiCommand classes are renamed to `CircularArray`,
`OrthoArray`, and `PolarArray`. This is a shorter name than the
previous `GuiCommandCircularArray`, `GuiCommandOrthoArray`,
and `GuiCommandPolarArray`.
These classes are not part of the scripting interface of Draft
so we don't risk breaking previous files.
Small spacing fixes like imports in separate lines
for more clarity, the module docstring,
and the position of the license.
Remove unnecessary check for the graphical interface
as this command should be imported when the interface
is already up and running.
Use proper `ToDo` class instead of importing `DraftGui`.
It replaces the older `Draft_Array` command, and provides
a task panel to select the properties, similar to the
`Draft_PolarArray` and `Draft_CircularArray` commands.
It can also create `App::Links` directly from this task
panel, so it also replaces the `Draft_LinkArray`
introduced by the LinkMerge.
