增加摇晃动画
增加拖动到边缘停留时换页
Merge pull request #1 from lei-april/master

Major functions are implemented
After Lei's 1st merge
添加deleteChildOfCatInLib
去除第一个按钮为返回的特性，自动添加新的一页
Merge pull request #2 from lei-april/master

some bugs fixed, but not all of them
修复bug

1. 修复新建卡片时第一次显示为空白
2. 修复多选添加崩溃
增加card表的Removable一列
a few minor changes
track a new file under xcodeproj
Merge remote-tracking branch 'upstream/master'

Conflicts:
	iosapp.xcodeproj/project.pbxproj