Added second add() method
Fixed an issue where ReturnObject was not being returned. Refactored get()
Added tests for all the error messages
Added test for getReturnValue()
Added two new functions. 1) isFull() checks if the array can take anymore values 2) moreSpace() creates a array that is bigger than the old array by 1
Added a condition for checking if the array is full, in the two add() methods
Created a node class to be used in the Linked List
Finished isEmpty(), size() and get()
Added remove()
Added part of first add()