xtaci/kcptun v20160906

SMUX optimize!

on GitHub

1. memory allocation reduce in smux.
2. fix a possible leak in smux.
3. a full lint for the source codes.

$ go version
go version go1.7 darwin/amd64

kcptun : 3127b2d
kcp-go: xtaci/kcp-go@fdc1712
smux: xtaci/smux@f78c306

MD5 (kcptun-linux-amd64-20160906.tar.gz) = 77723cd673e5e03b64d4973a9a54605b
MD5 (kcptun-linux-386-20160906.tar.gz) = 72b572b38fdc625294783a58be978b05
MD5 (kcptun-darwin-amd64-20160906.tar.gz) = 700500b2a802e3fda2285f5cda508f40
MD5 (kcptun-darwin-386-20160906.tar.gz) = b09a9cfd7bfe4231b22f02b45ecd38ec
MD5 (kcptun-windows-amd64-20160906.tar.gz) = 0943014cdb9f4555bad35eb42702b538
MD5 (kcptun-windows-386-20160906.tar.gz) = 2e7ddfcdb606cf5dcda0eba14839303b
MD5 (kcptun-freebsd-amd64-20160906.tar.gz) = 6ecf96c6e8f915db1d9ae3cd9604bffe
MD5 (kcptun-freebsd-386-20160906.tar.gz) = 553cefa3a801d960a4ddf2999af03001
MD5 (kcptun-linux-arm-20160906.tar.gz) = 313f2e27d9195fe2b950cf93e0b83cee