Merge pull request #1 from carfly/master

Add NumPy Outline
Merge pull request #2 from carfly/master

SciPy稀疏矩阵(sparse matrix)操作
添加BI转换成字符串的题目
Merge branch 'master' of github.com:Oneplus/scir-training-day
完成题目描述
添加样例程序和数据
Merge branch 'master' of github.com:Oneplus/scir-training-day
修改了错误，添加了运行方法
rename the folder name for 1st trail
add an empty readme for 2.2
add max matching word segmentation
Add HMM exercise