Update branch aliases
Revert "merged branch Seldaek/master (PR #4133)"

This reverts commit 00e7a94a8c761a3e10c388e4d06cb3ce4cd04ad7, reversing
changes made to a01dec00f4e8de357cce5fdf121ac98729f7f8ff.
fixed CS
updated minimum PHP version to 5.3.3

5.3.3 has some interesting fixes and this is the version used by
Redhat 6 and Debian 6
Replaced &raquo; and &nbsp; for XHTML compatibility
[WDT] added documentation link

the doc server redirects to the correct branch according to the symfony version
merged branch Tobion/doc-link (PR #4140)

Commits
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709be4b [WDT] added documentation link

Discussion
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[WDT] added documentation link

This adds a documentation link in the WDT for the appropriate branch according to the current symfony version.
@weaverryan there is no documentation branch yet for the currently created 2.1 branch.
Also it might be a nice feature to redirect the dev branch to master automatically on the website. I.e. `http://symfony.com/doc/2.1/index.html` -> `http://symfony.com/doc/master/index.html`
@fabpot It might be a good idea to introduce a `Kernel::BRANCH` constant. So there would be no need to extract the branch from the symfony version in `ConfigDataCollector`. And bumping new versions/branches would be in one place.

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by vicb at 2012-04-27T14:17:07Z

Maybe the documentation server should redirect to the right version according to `Kernel::VERSION` (i.e. using rewritting) ?

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by Tobion at 2012-04-27T14:31:49Z

That would be best yes.

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by fabpot at 2012-05-10T06:03:45Z

FYI, I've added some more constants about the Symfony version: 48099a852cc3 (modeled after PHP constants)

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by fabpot at 2012-05-10T07:08:57Z

I've just updated the website to accept any `HttpKernel::VERSION` string. Some redirection examples:

 * 2.0.12 -> current
 * 2.0 -> current
 * 2.0.12-DEV -> current
 * 2.1 -> master
 * 2.1.0-DEV -> master

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by Tobion at 2012-05-10T12:49:16Z

:thumbsup: for updating the website. But I think you missed to return 404 for a non-existent main doc page.
http://symfony.com/doc/2.4/book/controller.html -> 404 as expected
http://symfony.com/doc/2.4/index.html -> does not return 404 (and all links there are dead)

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by travisbot at 2012-05-10T15:12:07Z

This pull request [passes](http://travis-ci.org/symfony/symfony/builds/1296057) (merged 04adf361 into a01dec00).

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by fabpot at 2012-05-10T17:21:06Z

I've fixed the doc index for non-existing versions. Can you squash your commits before I merge? Thanks.

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by Tobion at 2012-05-10T22:49:18Z

done

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by travisbot at 2012-05-10T22:52:13Z

This pull request [passes](http://travis-ci.org/symfony/symfony/builds/1300414) (merged 709be4b7 into fae4523f).