fix typo, update the index_cn.html, add new information
Merge pull request #51 from jinglong/master

add document files for upstream keepalive_timeout directive
Merge pull request #52 from yaoweibin/update_20130522

fix typo, update the index_cn.html, add new information
Merge pull request #54 from jinglong/master

fix a configure error in keepalive_timeout.html
added the release content for tengine-1.5.0
added docs of trim module
added the docs of http_core module
tiny fix
Merge pull request #55 from yaoweibin/tengine-1.5.0

Tengine 1.5.0