change freewheel logo.
add knewone logo to repo
Merge branch 'master' of github.com:pragmaticly/rubyconfchina.org
Update logo.png
Update favicon.ico
Merge pull request #1 from technommy/master

New banner logo and favicon
Update logo.png
Update favicon.ico
Merge branch 'master' of github.com:ruby-china/rubyconfchina.org
replace pragmatic.ly to fengche.co
Merge remote-tracking branch 'jasl/master'
Merge pull request #2 from sishen/master

Replace pragmatic.ly with fengche.co
update