Add missing booster documentation (#226) (#227)

Author: builder-247

Documentation/methods/boosters.md

@@ -7,17 +7,25 @@ Returns list of boosters.
 ## Parameters
 - key
 
-## Example Booster
+## Example Response
 ```php
-[
-    {
-        "purchaserUuid": "",
-        "amount": 3, // multiplier
-        "originalLength": 3600,
-        "length": 2329, // length remaining
-        "gameType": 20, // GameType ID
-        "dateActivated": 1471657389139 // unix timestamp
-    },
-    ...
-]
-```
+{
+    "success": true,
+    "boosters": [
+         {
+             "purchaserUuid": "",
+             "amount": 3, // multiplier
+             "originalLength": 3600,
+             "length": 2329, // length remaining
+             "gameType": 20, // GameType ID
+             "dateActivated": 1471657389139 // unix timestamp
+             "stacked": [
+                "" // array of up to 10 UUIDs who have stacked the booster, or "true" if there are none
+             ]
+         }  
+     ]
+     "boosterState": {
+        "decrementing": true  // indicates whether booster duration is ticking down
+     }
+}
+```