Splitted enemies. Fixed flying enemies. Minor fixes

FlyingEnemy.py

@@ -0,0 +1,25 @@
+"""
+Flying enemy entity class
+"""
+
+
+import pygame
+import random
+from Enemy import Enemy
+
+
+class FlyingEnemy(Enemy):
+    def __init__(self, mainGameClass):
+        Enemy.__init__(self, mainGameClass)
+
+        self.subtype = random.randint(1, 7)
+
+        self.image = pygame.Surface((50, 25))
+        self.image.fill((51, 51, 0))
+        self.rect = self.image.get_rect()
+        self.height -= self.rect.height/2 + 10 + 10*self.subtype
+
+        self.rect.center = (mainGameClass.getScreenWidth() + self.rect.width,
+                            self.height)
+
+        self.speed = self.thisGame.getGameSpeed()*2