Implemented the new class system. Class menu missing, only default classes working.

src/zr/playerclasses/clientalpha.inc

@@ -0,0 +1,28 @@
+/*
+ * ============================================================================
+ *
+ *   Zombie:Reloaded
+ *
+ *   File:        clientalpha.inc
+ *   Description: Handles transparency on clients.
+ *   Author:      Richard Helgeby
+ *
+ * ============================================================================
+ */
+
+/**
+ * Updates the alpha value on a player.
+ */
+ClassAlphaUpdate(client)
+{
+    new current_health = GetClientHealth(client);
+    new max_health     = ClassGetHealth(client);
+    new max_damage     = ClassGetAlphaDamage(client);
+    
+    // Calculate if enough damage is done to change alpha.
+    if ((max_health - current_health) > max_damage)
+    {
+        new alpha_damaged = ClassGetAlphaDamaged(client);
+        SetPlayerAlpha(client, alpha_damaged);
+    }
+}