Add script to build client.
Simplify travis config.
Fix test.
Use leaky buffer to when piping data.
go get leakybuf in travis config.
Don't use atomic insn. to count concurrent client connections.
Revert "Simplify travis config."
Move all scripts into script directory.
Add shadowsocks-tray.exe (modified from goagent.exe)
Bump version to 0.6.1
Merge branch 'release/0.6.1'