Changes to the main class Calculator

Added functionality to splitNumbers and add which passes the test
testDifferentDelimiters.
Test for negative numbers

Added test to CalculatorTest class which prints out negatives not
allowed and the negative number if negatives are contained in the
string.
New test for negative numbers

Added test to CalculatorTest class that throws exception if string
contains negative numbers
Refactoring negative test

Added space in the text file assertEquals also import for
junit.framework.
New functionality for negative numbers

The function sum is able to take in negative numbers and throw an
exception if they are.
Refactoring of sum function

Added comments to the code also some beautification and added
readability.
Added test to CalculatorTest class

Tests if numbers that are larger then 1000 are ignored.
Refactor testcode

Changed the values for over 1000 test.
Refactor testcode

Needed semmicomma at the end of assertequals
New functionality to the Calculaotr class

Added in the sum function, if numbers are larger then 1000 they are not
summed up with positive numbers.
Refactor of calculator class

Some beautification and commenting in the sum function.
New test to CalculatorTest class

Test that checks for delmiters of any lenght.