Project home redesign

* more focus for description and stars/forks
* rename activity -> to project tab
* put activity under tab: prepare place for README tab

Fixes #1534.

See merge request !1047

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

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

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

Conflicts:
	CHANGELOG

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

* more focus for description and stars/forks
* rename activity -> to project tab
* put activity under tab: prepare place for README tab
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Improve search output

See merge request !1046

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

Delete invalid taggings during label migration

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

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

I'm feeling paranoid about the scope variables like redis_config_file
get defined in. Hiding it in a block to limit the scope.

Fixed parralel diff button on 'merge_requests/new' page

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

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

Improve search page

Fixes #1270

* added pagination support
* filter results by type
* when switch between context - search params stays
* redesign comment search results
* search Issues and MR by description too

## Screenshots:

![Screenshot 2014-08-27 09.56.18](https://dev.gitlab.org/uploads/gitlab/gitlabhq/2053220cd4/Screenshot_2014-08-27_09.56.18.png)

![Screenshot 2014-08-27 09.56.00](https://dev.gitlab.org/uploads/gitlab/gitlabhq/726c764da4/Screenshot_2014-08-27_09.56.00.png)

See merge request !1043

Diff headers made sticky.

Added a checkbox to toggle line wrapping in diff.

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

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

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

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

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

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

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

Do not specify postgres-version while installing

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

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

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

Gitlab::SearchResults and Gitlab::ProjectSearchResults are libraries we
are going to use to get search results based on query, enitity type and
pagination.

It will allow us to get only issues from project #23 where title or
description includes 'foo'.

Ex:

search_results = Gitlab::ProjectSearchResults.new(project.id, 'foo', 'issues')

search_results.objects => # [<Issues #23>, <Issues #34>]
search_results.issues_count => 2
search_results.total_count => 12 (it includes results from comments and
merge requests too)
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

Conflicts:
	CHANGELOG

Expire Rack sessions after 1 week

This has the side effect of preventing Redis from clogging up with old sessions.

See merge request !1042