remove xreadline for python 3.4 support #21
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基于 OpenSUSE 42.3 + Python 3.4 修改测试
强制设定环境为 python3 ; 取消不建议的 xreadlines() 方法(Python 3.4+ 无法使用);使用 os.get_terminal_size().columns 取代 getTerminalSize()
base OpenSUSE 42.3 + Python 3.4
force set ent as python3; remove xreadlines(); replase getTerminalSize() by os.get_terminal_size().columns