Added test if Fizz is printed when number is divisible by 3
Added functionality that prints Fizz when number is divisible by 3
Added test and functionality to print Buzz when number is divisible by 5
Added test to check if FizzBuzz is printed when number is divisible by both 3 and 5
Added functionality to print FizzBuzz when number is divisible by both 3 and 5
Renamed some test functions
Added more tests
Added simple test for testing prime number print
Added function to check prime numbers
Fixed test values after adding prime number test and printing in app
Added prime number print to calc function
The count number can now be given as an argument to app.py
added try block to try importing StringIO from StringIO or io