got new junit and hamcrest files
"changed the two bin files"
added another test to test multiple numbers
added a test to test if the function allowed newline in the string and implemented it in Calculator
added tests to test if the function would accept a specific delimeter.  the function behind it was also implemented
fixed some paths in bin and set up a test case for negative numbers exceptino handling. this is not done although it works
implemented the negetive number blocker