_Update 20160726: recompiled with go1.7rc3 && optimize ikcp_send for stream mode_
_Update 20160803: recompiled with go1.7rc5_
_Strongly Recommended for Upgrading_
the default packet mode operations of kcp would introduce HOL-blocking for a single message; by eliminating message boundary with _stream mode_, this problem has relived.
kcp默认包模式的传输会引入单包的Head Of Line 阻塞问题，因此通过修改kcp，并在kcp-go中增加了stream模式缓解此问题，以降低网络延迟。（官方已同步）
MD5 (kcptun-linux-amd64-20160725.tar.gz) = 8c41e07356c50f970deb2c4a747f1b77
MD5 (kcptun-linux-386-20160725.tar.gz) = 6e3505cf52f90251ccbb0ce05fcb2bf3
MD5 (kcptun-darwin-amd64-20160725.tar.gz) = aee95702e65cff152951586acaa18f70
MD5 (kcptun-darwin-386-20160725.tar.gz) = 3d5b7781936556f995ed081e28235b7a
MD5 (kcptun-windows-amd64-20160725.tar.gz) = 756662eaf92d911223d856e00c9b8d2b
MD5 (kcptun-windows-386-20160725.tar.gz) = 7f9798166409da32c16af3de4e8618f6
MD5 (kcptun-freebsd-amd64-20160725.tar.gz) = 1c99e7dfc5d8d854e6ddab245d459514
MD5 (kcptun-freebsd-386-20160725.tar.gz) = e1e334f74601925d831693ae05acd15c
MD5 (kcptun-linux-arm-20160725.tar.gz) = 69cb70c1051e8502896b6192b40c2750