set up NSNumberFormatter
Set up block to enumerate through Roman Numeral array. Tested Roman Numeral I for 1
Ensured that test could produce II (2)
Can produce roman numeral V for 5
Can produce IV
Can produce roman numeral X for 10
Ensuring that VI can be produced for 6
Can produce IX for 9
Ensured could produce XIV for 14
Ensured could produce 20
Can produce roman numeral L for 50
Ensured could produce 60
Ensured could produce LXXVIII for 78
Can produce Roman Numeral C for 100
Can produce roman numeral XC for 90
Ensured could produce CXL for 140
Can produce D for 500
Ensured could produce CDXCIX for 499
Can produce M for 1000
Can produce roman numeral CM for 900