Takes any number of lists and appends them together
            as one list
         
         
         Arguments
         
- list
 
            - 
               
            
 
         
         Return Values
         
         A list with all arguments
            appended to the original. If no arguments are supplied, append returns nil.
         
         Examples
         
         Command: (append
               '(a b) '(c d))
         (A B C D)
         Command: (append
               '((a)(b)) '((c)(d)))
         ((A) (B) (C) (D))