commontype加了一个author函数，读取duc加了bs4，增加了统计文件夹
Merge branch 'master' of https://github.com/lavizhao/insummer

Conflicts:
	code/script/duc_to_QA.py
统计功能+语料重新处理
Merge branch 'master' of https://github.com/lavizhao/insummer
将实体扩展和处理语料两个分支合并