add advertisement in check log
add ad interface
fix float issue of qr-code in login page
add single ad interface, add timestamp to advertisement
display privilege group of employees, highlight principals
store commercials in db
remove default value of text fields
fix local environment js dependency
update angularjs to 1.3.2
schedule is nullable
cookbook is nullable
add create interface to commercials
add update interface to commercials
add ad config tab to operator page