Update dev_doc.markdown
Update dev_diary.markdown
Create design.markdown
change month and week calc method
Merge pull request #235 from williamherry/hotfix/month-and-week-calc-method

change month and week calc method
Update design.markdown
Merge branch 'master' of github.com:bay6/union
move the project fetch bay6 function from seed to model #236
added new task fetch_repos #236
Merge branch 'master' of github.com:bay6/union
modify the index of activities