Adding `FlxWaveSprite` - it creates a copy of a target `FlxSprite` and applies an animated wave displacement to it.
Minor changes to `FlxWaveSprite`
+ stopped making new `Rectangle`s and `Point`s
+ added speed value
+ added some comments for usage
Fixing Strength variable. (I almost 'get it' now...lol)
Merge pull request #56 from SeiferTim/dev

Adding `FlxWaveSprite`