WaterCombos: IceWave, and IceBullet

Added WaterSourceGrabber:
    - WaterSourceGrabbers are iteration-like object that animate bringing a water source block to a specific location. Torrent and WaterSpout wave uses this animation and so instead of duplicating code I just made it into a class. I specifically used this in the WaterCombo: IceBullet.
    
Modified WaterWave to allow for Ice capabilities:
   - WaterWave can be modified into an IceWave by modifying the WaterWave.iceWave boolean to true. This is specifically used in the ability WaterCombo:IceWave. The configuration options for IceWave are configured through WaterCombo.
    
Added 2 WaterCombos:
    - Information for WaterCombos can be found with /b help WaterCombo
    - IceWave: Create a WaterWave > PhaseChange (Left Click)
        IceWave is the ice version of WaterWave(WaterSpout). IceWave freezes and causes moderate damage to nearby enemies.
        - Default Config
            Damage: 3
            Cooldown: 6 seconds
    
    - IceBullet: WaterBubble(Tap Shift) > IceBlast(Hold Shift) > IceBlast(Left Click a water source) > Then alternate between left clicking and right clicking the ice.
        IceBullet lets you shoot shards of ice while being protected by a barrier. It is similar to the ability used by Tarrlok against Korra, except he used a dome of water. This ability uses a dome of ice that way the player can shoot with left clicking and right clicking, which wouldn't work with water because it isn't considered a physical block by bukkit. Once the dome has been created the player should alternate between left clicking and right clicking with IceBlast, the faster they click the faster they shoot.
        - Default Config
            Damage: 1.5
            Radius: 2.5
            Range: 12
            MaxShots: 30
            AnimationSpeed: 1
            ShootTime: 5 seconds
            Cooldown: 10 seconds
            
PhaseChange and HeatControl now work with WaterCombo Ice blocks

Added /b help WaterCombo and modified /b help AirCombo:
    - Added a better description for AirSweep.
    - Added information for IceWave.
    - Added information for IceBullet.