Add enum for classifying dt survival examples.

This enum will be used in decision tree learning. For example food classification will mean that player should go for food.

src/AI/DecisionTrees/projectSpecificClasses/SurvivalClassification.py

@@ -0,0 +1,11 @@
+from enum import Enum
+
+
+class SurvivalClassification(Enum):
+    """
+    For example food classification means that player should go for food.
+    """
+
+    FOOD = 0,
+    WATER = 1,
+    REST = 2