Added a Makefile option to run the built executable.
Added test base case. Also, function declaration of printNumeral and
return statement that solves base case.
Added test case for 1
Passed base case for 1.
Added test case for 2.
Passed base case for 2.
Added test case for 3.
Refactored out the multiple return statements by building the return string.
Refactored the multiple if conditions into a for loop.
Added test case for 5.
Passed test case for 5.
Added test case for 10.
Passed test case 10.
Added test case for 50.
Passed test case 50.
Added test for 100.
Passed case test for 100.
Refactored the numerals and their associative values into a map. Changed the conditional checking of case by case basis to an iterative lookup into the map.
Added a test case for 4.
Passed test case for 4.