version 0.7.0

[loggerhead]

Roadmap

• refractor with mio >= 0.6.x
• support HTTP proxy
• support windows
• fix issue Possible timing attack vulnerability #2

Problem

mio is buggy in windows and not stable currently. I am not going to update shadowsocks-rust until mio fixed issues in windows (e.g. poll of UDP socket will return Ok(0), see https://github.com/loggerhead/mio-udp-test for details)