Web Hook sends email of pusher

CHANGELOG

@@ -19,6 +19,7 @@ v 7.9.0 (unreleased)
   - Add a service to send updates to an Irker gateway (Romain Coltel)
   - Add brakeman (security scanner for Ruby on Rails)
   - Slack username and channel options
+  - Web hook sends pusher email as well as commiter 
 
 v 7.8.1
   - Fix run of custom post receive hooks

doc/web_hooks/web_hooks.md

@@ -21,6 +21,7 @@ Triggered when you push to the repository except when pushing tags.
   "ref": "refs/heads/master",
   "user_id": 4,
   "user_name": "John Smith",
+  "user_email": "john@example.com",
   "project_id": 15,
   "repository": {
     "name": "Diaspora",

lib/gitlab/push_data_builder.rb

@@ -9,6 +9,7 @@ module Gitlab
       #   ref: String,
       #   user_id: String,
       #   user_name: String,
+      #   user_email: String
       #   project_id: String,
       #   repository: {
       #     name: String,
@@ -35,6 +36,7 @@ module Gitlab
           checkout_sha: checkout_sha(project.repository, newrev, ref),
           user_id: user.id,
           user_name: user.name,
+          user_email: user.email,
           project_id: project.id,
           repository: {
             name: project.name,