Do not show the  Go Top button on the first screen
Merge pull request #80 from huobazi/master

不在第一屏幕显示 Go Top 按钮
nil bug fix on SiteConfig.new_topic_dropdown_node_ids call.
New style github repos require in Gemfile.
Add random tips on sidebar.
More test to topis_cell.
Now can ban reply when the Reply content is in ban words list. #78
Site validate url uniq bug fix on update;
Fix caching on sites page.
Still display deleted reply line in replies list, use 'was deleted' instead, for fix floor number orderless bug.
Log out memory usage on App start.
撤销被注释的功能
Fix bug on Reply bad word.
Rails 3.2.7 and fix test.
Solr split work on query bug fix. http://ruby-china.org/topics/4657
Remove duplicate will_paginate config file.
Fix solr conf.
Add Google+ share.
Add setup.rb to quick install ruby-china
Update README.md
Add ImageMagick require.
Merge branch 'master' of github.com:ruby-china/ruby-china