Fix code preview theme setting for comments, issues, merge requests, and snippets

User color scheme was not being used: default white color scheme was always chosen. Also, default background for code in notes was always overriding the user color scheme.

Closes #1139

See merge request !357

Escape wildcards when searching LDAP by username.

Addresses https://dev.gitlab.org/gitlab/gitlabhq/issues/2086.

Also see https://dev.gitlab.org/gitlab/gitlab-ee/merge_requests/344 and https://dev.gitlab.org/gitlab/omniauth-ldap/merge_requests/2.

See merge request !1644

Remove placeholder methods to prevent calling methods rather than attributes.

Since we have https://dev.gitlab.org/gitlab/gitlabhq/blob/7-8-stable/app/models/service.rb#L79 makes no sense to have methods as a placeholder.

See merge request !1676

Dashboard restyle

For #2069

See merge request !1675

Generate valid json

This patch helps to be compatible to other programing languages as it improves the validation of hook data. It seems only ruby can handle 'nil' as value while other json decode function will fatal.

See merge request !182

Make email display name configurable

#216

See merge request !80

Fix features checkboxes at admin settings page

For !1615

See merge request !1674

Active users check

For gitlab/gitlab-ee#248

See merge request !1673

Fix importers with OCC

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/1180

Using validates_uniqueness_of does not guarantee the absence of duplicate record insertions. When users click button "import all" it will create duplicating group in database and data integrity will be broken.

http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html#method-i-validates_uniqueness_of

I use optimistic concurrency control for handling this situation.

See merge request !1647

Reject access to group/project avatar if the user doesn't have access.

Closes #2050.

I'll add tests for EE logos once this is merged here and merged into EE.

See merge request !1671

Fix highlight of selected lines

* show color for highlighted line
* fix overflow by header

See merge request !1672

Properly move over `issues_tracker_id` from old custom issue tracker URLs.

Addresses https://gitlab.com/gitlab-org/gitlab-ce/issues/1124.

cc @marin Regression in 7.8.0.

See merge request !1670

Upgrade Docker build to GitLab v7.8.3

Upgrading from GitLab v7.8.1. Pretty simple change, tested with a quick Docker build.

See merge request !380

Use Gitlab::Git helper methods and constants as much as possible.

As discussed in https://dev.gitlab.org/gitlab/gitlabhq/commit/1cc41ce1adce23d3eb4a9c4ed0ab17e11ea1f1e3#note_38702.

See merge request !1668

Mention EmailsOnPush changes in changelog.

See merge request !1667

Added link generation for LinkedIn on user's Profile page

This is a very very minor change. Added a generated link to the LinkedIn portion of the user's profile.

See merge request !377

Also preserve code preview color scheme in events dashboard.

Assign default colors to all code blocks shown as <pre class="code highlight [color_scheme]">

Closes #1139