updated requirements
Merge branch 'master' of github.com:zonyitoo/blog
Merge branch 'master' of github.com:zonyitoo/blog
Merge branch 'master' of github.com:zonyitoo/blog
Merge branch 'master' of github.com:zonyitoo/blog
Merge branch 'master' of github.com:zonyitoo/blog
Merge branch 'master' of github.com:zonyitoo/blog
fixed bugs