Time for action – new weapons

1. Add the following declarations to the WeaponManager class:

   static private float rocketMinTimer = 0.5f;
   
   public enum WeaponType { Normal, Triple, Rocket };
   static public WeaponType CurrentWeaponType = WeaponType.Triple;
   static public float WeaponTimeRemaining = 30.0f;
   static private float weaponTimeDefault = 30.0f;
   static private float tripleWeaponSplitAngle = 15;

2. Replace the current WeaponFireDelay property with the following:

   static public float WeaponFireDelay 
   {
       get 
       { 
           if (CurrentWeaponType==WeaponType.Rocket)
           {
               return rocketMinTimer;
           }
           else
           { 
               return shotMinTimer;
           }
       }
   }

3. Replace the current FireWeapon() method with the following:

   public static void FireWeapon(Vector2 location, Vector2 velocity)
   {
       switch (CurrentWeaponType)
       {
           case WeaponType.Normal:
               AddShot(location, velocity, 0);
               break;
   
           case WeaponType.Triple:
               AddShot...