Created the Actor and Animation classes.

actor.py

@@ -0,0 +1,20 @@
+###########################################
+# Created on 1-9-2013. Miguel Angel Astor #
+###########################################
+import pygame
+from animation import Animation
+
+class Actor:
+    """ Represents any game object. """
+    def __init__(self):
+        """ Initializes the actor object. """
+        # All sprites for an actor are stored as a list of pygame sprites.
+        self.sprites = []
+        # Animations are stored as a key (animation name),
+        # value (list of sprite indices) pairs.
+        self.animations = {}
+        # Parameters.
+        self.angle = 0
+        self.speed = [0, 0] # [X speed, Y speed].
+        self.acceleration = [0, 0] # Ditto.
+        self.b_box = [0, 0] # [X length, Y length].