updated version to 2.4
Merge branch '2.3'

* 2.3:
  updated versions in the README file
  Remove +x mode on file
  updated doc links
  Fix deprecated function bind
  fixed typo
  updated composer.json
  updated VENDORS for 2.1.10
updated versions in the README file
allow master branch to install 2.4-dev
added a hello world command in demo bundle
configure the log to console handler

we require ~2.4 now as we use a new feature that was introduced in 2.4
also allow doctrine 2.4 to be installed
merged branch Tobion/allow-dev-2.4 (PR #557)

This PR was merged into the master branch.

Discussion
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Add hello world command to demo bundle and configure new log to console handler

First commit: allows the master branch to install 2.4-dev.
Second commit: added a hello world command in demo bundle
Third commit: configure the log to console handler that is possible since symfony/MonologBundle#42

Commits
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0cafa50 also allow doctrine 2.4 to be installed
b47328a configure the log to console handler
7baa790 added a hello world command in demo bundle
8a246dc allow master branch to install 2.4-dev
Merge branch '2.3'

* 2.3:
  Use kernel.http_method_override parameter
  udpated the CHANGELOG for 2.3
  Added 2.3 upgrade notes containing app_dev.php changes regarding debug component.
  updated VENDORS for 2.3.0
  Fixed accidentally removed status code in app/check.php

Conflicts:
	composer.json
made browser logs commented by defaults (refs #8413)
merged branch symfony/monolog-tweaks (PR #569)

This PR was merged into the master branch.

Discussion
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made browser logs commented by defaults (refs symfony/symfony#8413)

FirePHP and ChromePHP are now disabled by default as they can make the application broke if the web server is not configured with large header sizes.

see symfony/symfony#8413

Commits
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262af2d made browser logs commented by defaults (refs #8413)
added an UPGRADE file for 2.4
Unregister initial loader when using ApcClassLoader
merged branch Seldaek/patch-3 (PR #570)

This PR was merged into the master branch.

Discussion
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Unregister initial loader when using ApcClassLoader

I think it's quite bad to have twice the same loader registered because for autoloading classes (or class_exists calls) not handled by the main symfony/composer loader, it'll be called twice.

Commits
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43b3c14 Unregister initial loader when using ApcClassLoader
Cambiar nombre y descripción del package. Agregar bootstrap a requeridos.
Merge branch '2.3' of https://github.com/asterion/symfony-standard into 2.3