修复了一个CrossFade动画在低版本执行时的bug
在library中增加了ignition中的异步任务类

Signed-off-by: chenchong8806@gmail.com <chenchong8806@gmail.com>
Merge branch 'master' of https://github.com/chenchong8806/cc-project-demo.git

Conflicts:
	MyDemoSet/src/com/chen/demo/scrollable/ScrollViewPullToRefresh.java

Signed-off-by: chenchong8806@gmail.com <chenchong8806@gmail.com>