Added Move() function to PlayerMovement.cs

Created modular Move() function within PlayerMovement.cs. In same
script, started work on FixedUpdate() by obtaining input and setting
variables
Added Turning() function to PlayerMovement.cs

Added modular Turning() function PlayerMovement.cs
Added Animating() function to PlayerMovement.cs

Added modular Animating() function to PlayerMovement.cs
Updated FixedUpdate() in PlayerMovement.cs

Made calls to new Move(), Turning(), and Animating() functions in
FixedUpdate() within PlayerMovement.cs