Add test cases to cover the formatting bugs
Fix emoji, user/floor metion in code/pre
Fix underscores in user metion
Add rake task markdown_body:refresh to fix existing invalid HTML body
replace username with place holder to avoid markdown emphasis
fix private method `image_alt` in markdown.rb
Test @small_fish__ in highlighted ruby code block
Fix failed spec caused by Nokogiri escape
New pygments.rb version.
Update jquery.chosen to newest version.
fix require bug in production.
Add Nokogiri in Gemfile.
remove encoding convert.
move Setting.upload_url in markdown.rb to a method for testing
Fix spec examples failed because of new pygments version
Merge pull request #144 from doitian/fix-spec-errors

Fix spec errors
Add beta deploy environment.
Add a test case.
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Fix test.