Release: SEnginx v1.6.0

Changes:

    *) Feature: upgrade to original nginx 1.6.0.

    *) Feature: enhancement to dynamic resolve functionality.

    *) Feature: ngx_http_statistics module that supports
                monitoring traffic and attacks.

    *) Feature: add a demo html page to demonstrate
                ngx_http_statistics module, thanks to Yu Qing.

    *) Feature: upgrade Mod Security to 2.8.0.

    *) Bugfix: in cookie poisoning module.

Signed-off-by: paulyang <paulyang.inf@gmail.com>