Implemented basic CocktailSort function
Created a copy of supplied list to prevent changing the supplied parameter.
Implemented list iteration control structure.
Corrected error in Go syntax related to swapped variable and return parameter.
Implemented iterative control structures
Implemented swapping test.
Implemented swap to reorder elements in the list
Implemented swapping call in forward swap.

Reimplmented swapping call with minor ordering revision in conditional loop for the backward swap.