Skimming mode added (-k/--skim option) In skimming mode, as soon as a single test case within a test group is failed, the remaining test cases in the same group are skipped. Bug fix and simply a bit of refactoring: TestCase.has_iofiles and TestCase.has_ansfile are now defined (the meaning should be clear from the names).

import sys
if sys.version_info[0] >= 3:
	from zipfile31 import *
elif sys.version_info[1] >= 7:
	from zipfile27 import *
else:
	from zipfile26 import *