Test code issues:

• Windows: failed by test-code problem depends on os.sep.

Implementation issues:

• Python2.5: failed by using os.path.relpath that introduced at Python-2.6.
• Python2.5: test failed by using inspect.ArgSpec that introduced at Python-2.6.
• fix for Python3: Python3 open() decode text by locale.getpreferredencoding() that cause UnicodeDecodeError when locale is not utf-8.
• fix for Python3.1: Python 3.1 can't proceess '\r' at parser.