修改CAActivityIndicatorView的显示bug
增加CC_DLL
增加CAPageControl的点击选择功能
修改CADatePicker在随意滑动时，数据错乱的问题
CrossApp 0. 3. 3 Update (English version)

CrossApp 0. 3. 3 Update (English version)
This includes seven updates.
Update README.md
修改 CAPageControl 和 CAStepper，增加图片支持，增加按照Frame自适应大小
同步master
修改编译错误
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Merge commit '8a7d4625ea77a73c16e0d959d6d0e7c3d66366e7' into branch_Liyuanfeng
修改CAPageControl，增加风格选项
修改CAActivityIndicatorView，增加图片功能
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Merge commit '02025b2cdeafde8f0fd4a4bb19f602abe949aeb0' into branch_Liyuanfeng
Merge commit 'b0d9958c33e9d40f6d009bfa115fb4e4aae0dcdd' into branch_Liyuanfeng
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