Proposed changes to Unit 2, 3, 4, 6 projects.

[Dan-TEALS]

Discussed in #349

^{Originally posted by jdonwells February 12, 2022}
A separate discussion was opened for changing the Unit 2 project to an expert system. #339

Remove lesson 2.06 because it isn't needed.

The Unit 3 project can be the Tic-Tac-Toe game from Unit 4. There are only 9 moves possible in a full game so a loop, while nice, isn't strictly required. Everything can be done with functions and no loops.

Move Oregon Trail from Unit 3 to Unit 4 when loops are made available.

Move Zork from Unit 2 to Unit 6 when dictionaries are available. The Guess Who game seems to suffer without graphics anyway. Dictionaries will allow room contents to be a short string and translated into a longer description with a dictionary. Items in the bag can have short string identifications with longer descriptions in a dictionary for printing. Etc.