Partially implement #770.
Add "Default Webhooks" page in site admin UI.
Persist to the existing webhooks table, but store with RepoID=0 and OrgID=0.
Upon repo creation, copy the set of default webhooks into the new repo.
* add more webhook support
* move hooks templates to standalone dir and add more webhooks ui
* fix tests
* update vendor checksum
* add more webhook support
* move hooks templates to standalone dir and add more webhooks ui
* fix tests
* update vendor checksum
* update vendor
Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
* load attributes when created release
* update comparsion doc
