Refactoring performed on the code

[janvipatel1412]

I went over the project and refactored a few items to make the code more readable. The changes to the code are:

1. Rename Variable: In the class StrobeEffect.java, I refactored a variable that was declared as amt to amount to make it more meaningful.

2. Extract Method: In the class FourierTransform.java, I refactored a method named computing. I extracted a block of code from the method as it was feasible to put a logic that was different from another method.

3. Move Variable: In the class SparkleEffect.java, a variable amount was more used in SparklePattern.java rather than the SparkleEffect.java class. So, it was moved to another class.

4. Pull up variable: A variable was not declared in the class LXAudioComponent.java, but its two subclasses LXAudioInput.java and LXAudioOuput.java had it declared. So, I removed the variables from both the subclasses and pulled them up to the superclass.

5. Extract Class: In the class LXCommand.java, there were other subclasses that performed different operations. So, I moved them to another class which I made.

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