0.4.0

HinetPy is stable now.

• win32.extract_sac: skip if data not exists
• win32.extract_sac: support multiple processes to speedup, and no longer return values
• Client.get_waveform: support multi-threads to speedup
• Change Client.help() to Client.info()
• Client.get_waveform now can automatically set max_span
• Client.get_* now support startime in different string formats