[Tutor] ANN: new release of RUR-PLE

[André Roberge]

Version 0.8.6a is now available.

This version is mostly a bug fix version.
* unicode problem corrected (bug introduced in version 0.8.5)
* linenumber information on syntax errors corrected
* removed the URL browser capability
* corrected typo and change explanation of next_to_a_beeper() in lessons
* corrected name of robot in one lesson

Addition:
tower of Hanoi solution(.rur file) (with two typical .wld files)
8 queen puzzle solution (.rur file)

Additional changes expected in version 0.8.6b

André