fix some named bug
增加todo txt 分支结束后要删掉
history mode
压缩migration
设计评注模块
project的增删查改
story的添加
重整stories目录
fix project index view
把projectlog列表显示模块抽取出来
include cancancan and rolify
remove permission model
clean permission model
use rolify to admin?
add change domain
remove unneeded manytomany
repository's create edit view remove
set respositories controller using rolify
fix document role bug
remove uneeded creator_id