Commit initial files
Add support for basic binary operations
Move core code to separate routine
Add test cases for calculate
Add % (modulus) to list of supported operators
Add parentheses support
Code improvements
Fix issue with operators of same precedence
Allow whitespaces in between operators and operands
Improve parsing to include other forms of whitespace
Allow command line input to be separated by spaces
Echo the input formula to the user before displaying the result
Add support for floating point operations
Add description and author information
Add README file
Add missing word to description