add solvable klondike

[bwrightkc]

Add a mode of Klondike that deals only known solvable games. Including 79,000 seeds that are known solvable (used ShootMe's Klondike-Solver). The seeds are not further broken down into difficulty ala Microsoft Solitaire, so it's a mix of difficulties at this time. Working on a "difficulty" level option/game choice in the future for Klondike.

[joeraz]

Interesting approach. The challenge with a winnable games only option has always been that we'd need an algorithm to identify if a game is winnable, that works for all games. Or getting winnable seeds for every past, present, and future game. But this could work - at least unless someone comes up with a true winnable algorithm in the future.

I'd have to run some tests, but there are two comments I have so far:

• There is no game rules documentation page in html-src. Even if it's a simple variant, I do not accept new games without a rules file (can be something as simple as "Like Klondike, but you always get a winnable deal"). If, like you mention in the comments, manually entering a seed could result in a non-winnable deal, this is something that should be mentioned in the documentation, so no users complain.
• Currently, the pysollib/games folder just contains game definitions. Putting the seeds file there is a bit disorganized. Could you move it to a subfolder? That way, we'd have the architecture set up if we do more games this way in the future.

[bwrightkc]

Good points. Rules are in now, and moved the seeds to a solvable_seeds folder.