Added files (java and xml) for MoreWarningsInClass1 and
MoreWarningsInClass1_Refactored
Added calculateHases(...) in NewWarningDetectorTest.java
Refactored testFileWithManyWarningsHasSameHashcode()
Added evaluateHashes()
Refactored testFileWithManyWarningsHasSameHashcode()
Refactored getAst()
Added testPreviousHasMoreWarningsThanCurrent()
Added files (java and xml) for testPreviousHasMoreWarningsThanCurrent()