Merge branch 'add_mistake_ui' into dao
修改并修复dao模块几个方法
现在可以插入错题，但是有一个未解决的灵异的空指针异常
我要睡觉！

Signed-off-by: Harry Chen <373685963@qq.com>
修复空指针异常
Now we can insert mistakes!

Signed-off-by: Harry Chen <373685963@qq.com>
增加各年级的科目计数功能（感谢SF大神）
至此dao模块基本完善

Signed-off-by: Harry Chen <373685963@qq.com>
改进dao的API
同时去掉了ActionBar Tab的隐藏什么的……根本实现不了……Drawer那个包设计的就有问题
Signed-off-by: xavieryao <xavieryao@live.cn>
题目类型选择
Signed-off-by: xavieryao <xavieryao@live.cn>
Merge branch 'dao' into mistake_type

Signed-off-by: xavieryao <xavieryao@live.cn>

Conflicts:
	src/org/papdt/miscol/ui/fragment/FragmentAddMistake0.java
	src/org/papdt/miscol/ui/fragment/FragmentCategories.java
完成分类
Signed-off-by: xavieryao <xavieryao@live.cn>