pom --> added dependency for apache-commons math
ArrayLengthNotEqualException --> added this class for when two arrayLengths do not equal
IntegerNotValidException --> removed template comment at top
ParameterNotValidException --> added for if parameters of method are not valid
ChiSquare --> Added class to implement apaches chiSquaredImpl class into this project, does not currently seem to work
ChiSquareCalculator --> removed template comment at top
chiSquareTable --> removed template comment at top