Deleted sample data sql script
Merge pull request #20 from Zjazure/m3-dev

Merge m3 to master for deploy
Merge pull request #22 from Zjazure/m3-dev

Deploy notification center
Merge pull request #23 from Zjazure/m3-dev

fixed task accept and confirm in FF
fixed user update grade equal judging error
Merge pull request #24 from Zjazure/master

Fixed in school via github web page