Cache LDAP check everywhere

Tested as follows:

- sign in LDAP user;
- disable access via LDAP (in this case, disable the account in AD);
- check that the user can still access Git via SSH;
- check that the user can still browse and do API calls (issue dropdown);
- set the last_credential_check_at attribute to 2 hours ago in the console;
- SSH access fails;
- API call returns 401.

If I try to sign in again after the LDAP account was disabled, the effect is immediate.

See merge request !139

Feature admin emails

solves issue #126

One point remains. There is no clickable link to open the email page. Where should this link be communicated?!

# User Overview
![](https://dev.gitlab.org/uploads/gitlab/gitlab-ee/638fd79165/Screen_Shot_2014-08-12_at_17.30.53.png)

# Composing an email
![](https://dev.gitlab.org/uploads/gitlab/gitlab-ee/c07f753aec/Screen_Shot_2014-08-11_at_16.28.57.png)

# Unsubscribe
![](https://dev.gitlab.org/uploads/gitlab/gitlab-ee/db15c9f8b0/Screen_Shot_2014-08-12_at_17.32.27.png)

See merge request !140

Tnx to @jacobvosmaer for the suggestion
source: http://stackoverflow.com/questions/4394381/rails-url-helper-not-encoding-ampersands

Conflicts:
	db/schema.rb

Otherwise conflits will occur while merging with CE

This reverts commit 859aa33a.

Issue 133 custom jira issue transition

Fixed #133

![](https://dev.gitlab.org/uploads/gitlab/gitlab-ee/2947f69a9b/Screen_Shot_2014-08-11_at_22.04.35.png)

See merge request !141

Show ldap sync info on group pages

Fixes #141

See merge request !142

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

- when a proect configures "Lightweight issue tracking system for this project"
  to be "Issues tracker" = "Redmine", Wiki-Markdown text like "lorem ipsum #123"
  should be rendered to a hyperlink to Redmine
- without this patch/enhancment this did not work
- internal bugtracker id = redmine 16693

This will completely unsubscribe you from any admin emails

- Use html5 validation
- initiate create action

This reduces the time to load a page in development mode by 200%

Even simpler