Fixed the capitalization of a section heading
Replaced "variable" by "placeholder" when using {_format} inside a route
Removed the animated GIF showing how to install Symfony
Added a more useful message for users that don't have PHP 5.4
and try to execute the server:run command
Grammar fixes proposed by @weaverryan and @WouterJ
Restored the original line that explained how a routing file is imported
from a bundle
Restored all the original introductions for each tutorial part
[quick_tour] rewording and grammar fixes suggested by @weaverryan
[quick_tour] more rewording and grammar fixes
[quick_tour] removed an unneeded comma
[quick_tour] rewording and grammar fixes noted by @xabbuh
[Internals] Fix Profiler:find() arguments
feature #3613 Javiereguiluz revamped quick tour (weaverryan)

This PR was merged into the 2.3 branch.

Discussion
----------

Javiereguiluz revamped quick tour

Hey guys!

See #3562 - this is the same, but rebased against the 2.3 branch.

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

Off of the top of my head (but I could be wrong), the only thing that was 2.4 specific is the version number used in the composer.phar create-project command. We could fix this in 2 different ways:

1) Don't fix it - just always keep that number updated to the latest released version. We do this similarly in other places

2) Use "@stable" as the version constraint. I don't know of any drawbacks.

Thanks!

Commits
-------

1e36cfa [quick_tour] rewording and grammar fixes noted by @xabbuh
69fdff1 [quick_tour] removed an unneeded comma
30624eb [quick_tour] more rewording and grammar fixes
0f13ce9 [quick_tour] rewording and grammar fixes suggested by @weaverryan
7c0037e Restored all the original introductions for each tutorial part
cb98a6c Restored the original line that explained how a routing file is imported from a bundle
fdc755e Grammar fixes proposed by @weaverryan and @WouterJ
eca1e73 Added a more useful message for users that don't have PHP 5.4 and try to execute the server:run command
a013b11 Removed the animated GIF showing how to install Symfony
985c68f Replaced "variable" by "placeholder" when using {_format} inside a route
42bd69f Fixed the capitalization of a section heading
75be815 Minor rewording
c1ad15d Added a new headline to better structure the documentation
b16c3a2 Capitalized some sentences that come after a colon
2fdcffd When using server:run command, it's not necessary to add the `app_dev.php` controller
6afc80b Removed a wrongly inserted comma
e004661 Bundle names should not be placed in literals
38b1292 [quick_tour] removed inline links
81d6e20 [quick_tour] replaced "chapter" by "part" in some tutorial parts
50e136c [quick_tour] second pass to "the architecture" chapter
cdb7064 [quick_tour] second pass to "the controller" chapter and added a section about displaying error pages
2cd3bab [quick tour] second pass to "the view" chapter
4ad3c44 [quick_tour] second pass to the "big picture" chapter
e7dfc8b [quick_tour] simplified "the architecture" chapter
eb3fe4c [quick tour] simplified "the controller" chapter
dbbc8c2 [quick_tour] updated "the view" chapter
5b3a572 [quick_tour] finished the review of "The Big Picture" chapter
f24eabc [quick_tour] updated some screenshots
20e9fb0 [quick_tour] updated the "Controllers" section
29992cd [quick_tour] simplified the "routing" section
a84a556 [quick_tour] simplified drastically the first two sections of "The Big Picture" chapter
minor #3567 Update checkbox_compound.rst.inc (joshuaadickerson)

This PR was merged into the 2.3 branch.

Discussion
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Update checkbox_compound.rst.inc

*very* small typo

Commits
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d83a8cb Update checkbox_compound.rst.inc
minor #3568 Update checkbox_compound.rst.inc (joshuaadickerson)

This PR was merged into the 2.3 branch.

Discussion
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Update checkbox_compound.rst.inc

Sorry for the quick PRs in succession. Blame it on craue in #symfony

Commits
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4490dab Update checkbox_compound.rst.inc
Fixes to cookbook/doctrine/registration_form.rst
Made on additional fix as per previous pull request.
bug #3615 Fixes to cookbook/doctrine/registration_form.rst (Crushnaut)

This PR was merged into the 2.3 branch.

Discussion
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Fixes to cookbook/doctrine/registration_form.rst

As I was working through this example I noticed a few issues. Firstly, no button to submit the registration form is ever specified. Secondly, in the accountController the Response object is included, but not needed. Thirdly, the Request object is required in the code block for the method createAction in the accountController.

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all (or 2.3+)
| Fixed tickets | none that I know of

Commits
-------

b56ab13 Made on additional fix as per previous pull request.
adffc6b Fixes to cookbook/doctrine/registration_form.rst
Added anchor for permissions
[#3594] Nice tweaks thanks to @WouterJ and @xabbuh