Merge pull request #3 from tengcong/zyc

announcement and keywords, description.
Merge pull request #4 from tengcong/zyc

refine keyword and description
fix meta links turbolink load 4 ever bug
add friend-site panel
add swiftgiide friendship
change logo file
add three friend-sites
add 3 friend-site (new)
add 3 friend-sites (new)2
Merge pull request #6 from tengcong/zhai

add three friend-sites
recover page size
Merge branch 'master' of github.com:tengcong/campo
add model
add swiftchina.com
fix topic comments total_page bug
add logo to source code
change announcement contnet
change mailer address
add friend-site management function
add model