removed FileSetBuilderInterface
refactored FakeFileSystem to not use FakeFile
refactored FileSetSmoothTest
refactored FileSmoothTest
refactored JavacSmoothTest
refactored JunitSmoothTest
refactored MergeSmoothTest
refactored SaveSmoothTest
refactored NewFileSmoothTest
refactored JarTester, UnjarSmoothTest
refactored ZipTester, UnzipSmoothTest
added FakeFileSystem.assertFileContainsItsPath()
refactored UnzipSmoothTest
refactored FileSetSmoothTest
refactored FileSmoothTest
added FakeFileSystem.createFileContainingItsPath(root,path)
refactored FilterSmoothTest
refactored JarSmoothTest
refactored MergeSmoothTest
refactored SaveSmoothTest