Item Plando updates (#226)

* Item Plando updates

Add True option for item count to place the number of that item that is in the item pool.
Prioritize plando blocks by location count minus item count, so that the least flexible blocks are handled first to increase likelihood of success.
True and False for Force option are coming in as bools instead of strings, so that had to be accounted for.
Several other bug fixes.

WebHostLib/static/assets/tutorial/archipelago/plando_en.md

@@ -56,9 +56,10 @@ list of specific locations both in their own game or in another player's game.
     * Single Placement is when you use a plando block to place a single item at a single location.
         * `item` is the item you would like to place and `location` is the location to place it.
     * Multi Placement uses a plando block to place multiple items in multiple locations until either list is exhausted.
-        * `items` defines the items to use and a number letting you place multiple of it.
+        * `items` defines the items to use and a number letting you place multiple of it. You can use true instead of a number to have it use however many of that item are in your item pool.
         * `locations` is a list of possible locations those items can be placed in.
         * Using the multi placement method, placements are picked randomly.
+        * Instead of a number, you can use true 
     * `count` can be used to set the maximum number of items placed from the block. The default is 1 if using `item` and False if using `items`
         * If a number is used it will try to place this number of items.
         * If set to false it will try to place as many items from the block as it can.