[Cin] Blend Algebra and Program icons

[Phyllis Smith]

Checked into GIT, the BlendAlgebra/BlendProgram environment variables that
Georgy added into the Configuration section as latexed by Andrea. As usual
I added some punctuation in various places and rearranged things a little.
Also added that the variables "may be used in the future for other
purposes" as that could be especially relevant for CIN_EDITOR.

Question for Georgy?  Added CIN_CC, but I did not add just CC like Andrea
had because I think it is superfluous?

Commentary for Georgy! so far I have found no problems with using the
plugins from AppImage except you have to pay attention when you use Attach
with an empty Function field with what comes up in the "Select function
source file" menu for Project and Userlib.  Which is also true of a regular
build and this is not an issue once set up by an ordinary user who will
want to use their own setup.  Syslib works just fine in this case and if
you click on "Edit..." the file comes up as Read-Only (at least in gedit)
as it should.

I am still going through the Manual changes locally (not checking in
changes until done) and testing.  One thing I noted and will add to the
"Refresh" commentary is that you have to move the pointer before the
"Refresh" action is displayed on the timeline/compositor.

One more detail: for BlendAlgebra several new environment variables were
> introduced: CIN_EDITOR, CIN_CC, CIN_USERLIB, etc. They are documented in
> the
> plugin's section of the manual. Perhaps there is reason to mention these
> environment variables additionally in the other section, dealing with all
> the CinGG environment variables. It might even happen that some of them
> later could be used by some other parts of CinGG software, who knows...
>
>
> _______________________________________________________________________________
>
>
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