after selected recipes and packages, when user clicked "build package",web server will send users operation and data to bitbake server by helper restful interface,bitbake server in processing request will trigger many of events and send logs back to web server,web server stores logs into db and returns the result to client.
after successfully parsing recipe can obtain base image list and recipe list,once user select one of the available image,some dependent recipes will be selected by default,on this basis, user can reselect recipes,after click "build package" button, system will send build configuration and selected base image to bitbake server by restful interface,bitbake server will deal with request and return the result to django,displays progress bar and event in the front page.
Webhob feature has changed, the feature will be abandoned.
remove it.