add rake tasks for web hooks management
add help page for web hooks management using rake tasks
Update logic for validates_merge_request for tree of MR

For case:

Merge request №1: branch "feature" to "release" and remove "feature" branch

Merge request №2: branch "release" to "master" and remove "release" branch

Merge request №1 - broken :(
Remove -y option when removing puby1.8

Since it is easily could break installations running on the server - hence the person doing the install should be able to make the decision to remove himself.
Warning about issue numbers.
Fix project_id field in MergeRequest API
Merge pull request #4916 from marbindrakon/merge_request_api

Fix project_id field in MergeRequest API
Improve user block logic

When block user - remove it from joined groups
Dont remove user from own resources (groups, users)
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Use flash message for notification across app
Show amount of users and projects in Profile#groups
Return empty abilities if user is blocked
If user is owner of project it cant be removed from this project
Remove team mentions
Minor UI improvements
Fix spinach tests
Add links to create branch/tag from project home page
Few fixes to spinach tests
Services and hooks MUST BE executed on branch push!
Rewrote init script.