FMSLogo Code

Strip trailing whitespace from localizedstrings-*.txt to stop it from re-appearing in localizedstrings-*.h after running mklocale.pl.

Strip trailing whitespace from mklocale.pl so that it doesn't re-appear in the generated internationalizedstrings.h.

Fix a misspelling of "asteroids"

Add a startup variable so that people who double-click on playChess.lgo see something.
Otherwise they might think the game is completely broken, since the rest of the extras do something on startup.

Change "st" to SHOWTURTLE to make chess compatible with the Italian FMSLogo.

Change "setze" to "make" so that chess is compatible with all languages, not just German.

Integrate a Chess game contributed by Alexandar Vezo
https://sourceforge.net/p/fmslogo/discussion/500407/thread/f69f304933/

Upstream Source: https://github.com/AlexVezo/FMS-Logo-Chess

Silence the warnings about "NT" appearing in the documentation for SHELL.
This is due to a recent change that uses "Windows NT" in a file path.

Fix Bug #595; GENSYM now buries the variable "gensym.number", as UCBLogo does.
Also, update the help entry for GENSYM to clarify this behavior.

Add a reminder to upload files in the "media" directory.
I had forgotten to do this when I added some new screenshots and the <img> has been broken since.