BButton 2.0 发布，BButton 是 UIButton 的子类，实现类似 Bootstrap 框架中的按钮风格。
值得关注的改动包括：
Up-to-date for iOS 5.0+, ARC, Storyboards
Custom initialization methods for easier creation
Option to show button 'disabled' state
New button type options
FontAwesome already included
Refactored to be much cleaner, better organized
项目主页：https://github.com/mattlawer/BButton
来自:开源中国社区
