Revert README avatar to original version
In my attempt to rid the world of `gitlab_logo.png`, I didn't realize that http://about.gitlab.com was hosted somewhere else and hence the original link worked fine.
See merge request !876
Fix downloading of patches on public merge requests when user logged out
### What does this MR do?
This MR makes it possible to download a diff patch on a public merge request when a user is logged out.
### Why was this MR needed?
An Error 500 would result when a user attempted to click on the "Email Patches" or "Plain Diff" button:
```
NoMethodError - undefined method `id' for nil:NilClass:
lib/gitlab/backend/shell_env.rb:9:in `set_env'
lib/gitlab/satellite/action.rb:20:in `in_locked_and_timed_satellite'
lib/gitlab/satellite/merge_action.rb:49:in `diff_in_satellite'
app/models/merge_request.rb:219:in `to_diff'
app/controllers/projects/merge_requests_controller.rb:42:in `block (2 levels) in show'
```
### What are the relevant issue numbers?
* Closes#1225
* Closes#1854 (dup)
* Closes#1858 (dup)
See merge request !872
Fix error when deleting a user who has projects
### What does this MR do?
This MR fixes an error that prevented users from being deleted in the Admin page if the user had personal projects.
### Why was this MR needed?
Deleting a user who had projects would result in an error such as this:
```
Started DELETE "/admin/users/tdb1" for MYIP at 2015-06-22 20:53:02 +0100
Processing by Admin::UsersController#destroy as HTML
Parameters: {"authenticity_token"=>"[FILTERED]", "id"=>"tdb1"}
Completed 500 Internal Server Error in 30ms (ActiveRecord: 6.7ms)
NameError (undefined local variable or method `current_user' for #<DeleteUserService:0x0000000cd01d38>):
app/services/delete_user_service.rb:10:in `block in execute'
app/services/delete_user_service.rb:7:in `execute'
app/controllers/admin/users_controller.rb:89:in `destroy'
```
### What are the relevant issue numbers?
* Closes#1856
* Closes https://github.com/gitlabhq/gitlabhq/issues/9394
See merge request !868
Animation of Sidebar (video in here)
Edited the CSS of header and sidebar; added a new div of gitlab-logo-container to the html to make things easier.
The transition-duration is set to 0.3s and when the nav bar expands, it opens up over the text, essentially revealing hidden text.
[animation-sidebar-2.mov](https://gitlab.com/gitlab-org/gitlab-ce/uploads/b15996a256d6bed03a19c68549d116e4/animation-sidebar-2.mov)
/cc @JobV @nicolas2
See merge request !849
karen Carias
Job van der Voort
Dmitriy Zaporozhets
Stan Hu
Douwe Maan
Valery Sizov
Rowan Wookey
Robert Speicher
Darby
