Implement the random puzzle feature

[owenca]

Also, clean up integral types int8, uint8, int32, and uint32.

Note: the feature is turned off for now because the GUI side is not done yet.

[owenca]

Uncomment this line to play with the random puzzle feature, which only works for the 5x5 grid size with the minimum number of moves set to 5.

[humdingerb]

It's randomizing alright. :) Merge?

Idea: instead of another menu "Random" in the bar, you could move it into the "Game" menu as "Random game >" and have it behave like e.g. the "Open >" menu of ShowImage: A submenu holds the different grid sizes (with a checkmark of the currently used size). Selecting a grid size starts a random game with that size. Clicking directly on the "Random game >" menu item does so directly.

[owenca]

Yes, please merge.

you could move it into the "Game" menu as "Random game >" and have it behave like e.g.�� the "Open >" menu of ShowImage: A submenu holds the different grid sizes (with a checkmark of the currently used size). Selecting a grid size starts a random game with that size. Clicking directly on the "Random game >" menu item does so directly.

I did it exactly the same way before (except that I had "New >" instead of "Random game >"). For some reason, I felt it was awkward with "Puzzle pack" and "Level" on the menu bar. I still have the code and can merge it if necessary. :)

[humdingerb]

You decide what's best. :) Maybe keep the code around, just in case...

[owenca]

Some facts about the game:

Dimension	Fraction of solvable puzzles	Maximum number of moves required
3x3	All	9
4x4	1/16	7
5x5	1/4	15
6x6	All	36