Move issue create/update code to services

Reduce observers role in GitLab code

Readable-doc-readme

This prepares the doc readme for inclusion on the help page and gives it sections so you can quickly find the relevant part.

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

Conflicts:
	doc/README.md

Update satellites directory permissions

Fix reset of issue search on submit

Add Project Features to doc/workflow

Fixes #1123

Add print css to precompile list

Replace custom jquery css with native one.

Fixes wrong assets path for calendar in production

 Better title suggestion for new MR

Remove unused gems

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

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

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

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

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

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

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

Ex. if branch named "refactor-models" then title will be "Refactor models"
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

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

The goal of suych refactoring is to get rid of observers.
Its much easier to test and code when object creation and all other
related actions done in one class instead of splited across observers,
callbacks etc.
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Pin gem sidekiq version

Honor notification levels

Fixes #1093

New Sidekiq CLI syntax

Explain how to refer to JIRA issues

Show Sidekiq version in gitlab:env:info