* implemented logging of project and system web hooks
* implemented UI for user area (project hooks)
* implemented UI for admin area (system hooks)
* implemented retry of logged webhook
* NOT imeplemented log remover

Clarify how the milestone percentage is calculated in the docs.
Include example image of milestone.

Note how to add the annotation for preserving the IPs, and note the
requirement to run your ingress controllers using a daemonset in GKE.

This reverts commit b0498c17

Notification settings are described, but aren't mentioned where they
are or where to change them.

In https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/323/ we added support
to disable SSL verification because attempting to import projects from a
self-signed GH Enterprise instance will fail with an SSL error.