renamed TestingFileSystem -> TestFileSystem, moved to .testing.fs.base package
added TestFileTest
moved assertContentContainsFilePath from TestFile -> FileTester
creation methods in TestFileSystem returns TestFile
refactored SaveFunctionTest
refactored TestingFileSet
renamed TestingFileSet -> TestFileSet, mved to .testing.plugin.internal
renamed TestingJdkFile -> JdkFileTester, moved to .testing.common package
removed reduntant imports
moved ScriptBuilder to .testing.parse package
renaming classes in .testing.parse package
renamed TestingProblemsListener -> TestProblemsListener
renamed TestingSandbox -> TestSandbox, moved to .testing.plugin.internal package
moved TestSignature to .testing.function.base package