Added notes specifying the propagation behaviour for kernel.view and kernel.exception.
Add missing info about kernel.request event.
Changed phrasing to explain the effects off propagation stopping.
Fix incorrect event name.
Updated installation instructions to use the new Symfony Installer
fix feature freeze dates
readd mistakenly removed label
Removing some installation instructions
Change refering block name from content to body

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |
filesystem headlines match method names
[OptionsResolver] Fix Namespace link
minor #4607 [Best Practices] readd mistakenly removed label (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

[Best Practices] readd mistakenly removed label

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

The button was mistakenly removed in c090a744c2ded4ff33b9f0f462adfdac8f5dae43.

Commits
-------

eabcc59 readd mistakenly removed label
update contribution guide for 2.7/3.0
bug #4599 [Contributing] fix feature freeze dates (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Contributing] fix feature freeze dates

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | #4510

Commits
-------

8f25a15 fix feature freeze dates
bug #4613 Change refering block name from content to body (martin-cerny)

This PR was merged into the 2.3 branch.

Discussion
----------

Change refering block name from content to body

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
-------

5c0ceff Change refering block name from content to body
minor #4617 [Filesystem] filesystem headlines match method names (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Filesystem] filesystem headlines match method names

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | #4450

Commits
-------

9d77a6d filesystem headlines match method names
bug #4623 [OptionsResolver] Fix Namespace link (xavren)

This PR was merged into the 2.3 branch.

Discussion
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[OptionsResolver] Fix Namespace link

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | #4620

Commits
-------

fc43571 [OptionsResolver] Fix Namespace link
Added '-ing' title ending to unify titles look

Currently all of the titles in Console section use gerund, but not this one.
minor #4625 Added '-ing' title ending to unify titles look (kix)

This PR was submitted for the 2.6 branch but it was merged into the 2.3 branch instead (closes #4625).

Discussion
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Added '-ing' title ending to unify titles look

Currently all of the titles in Console section use gerund, but not this one.

Commits
-------

74b75de Added '-ing' title ending to unify titles look
[#4625] Removing link added for BC, because this is the top of the page anyways