Bootstrap 2.2.0 發布

2.2.0增加四個新的示例模板，添加多媒體組件，新的排版刻度，修復了</span>box-shadow mixin bug和z-index issues等。更詳細信息：more.

亮點詳細介紹

• Added four new example templates to the docs, including a narrow marketing page, sign in form, sticky footer, and a fancy carousel (created for an upcoming .net magazine article).
• Added the media component, to create larger common components like comments, Tweets, etc.
• New variable-driven typographic scale based on @baseFontSize and @baseLineHeight.
• Revamped mini, small, and large padding via new variables for inputs and buttons so everything is the same size.
• Reverted 2.1.1's .box-shadow(); mixin change that caused compiler errors.

• 改進的下拉子菜單，支持dropups和左對齊子菜單。
• Fixed z-index issues with tooltips and popovers in modals.
• Hero unit now sets basic type styles for the entire component, rather than on .hero-unit p { ... }.
• 更新JavaScript插件和文檔至jQuery 1.8.1.
• 添加Contributing.md 文件.
• 添加通過Bower安裝Bootstrap.
• Miscellaneous variable improvements across the board.
• Miscellaneous documentation typos fixed.