removed deps checks in unit tests

As Composer is now widely used in the PHP world, having to run composer
install before running the test suite is expected. This also has the
nice benefit of removing a bunch of code, making things easier to
maintain (there is only one place to declare a dev dependency), and
probably more.
Fixed typos
duplicated the DebugClassLoader in the Debug component
Replace sha1 and md5 hashing with sha256 algorithm
updated the composer install command to reflect changes in Composer
Fix some annotates
Merge branch '2.2' into 2.3

* 2.2:
  Fix some annotates
  [FrameworkBundle] made sure that the debug event dispatcher is used everywhere
  [HttpKernel] remove unneeded strtoupper
  updated the composer install command to reflect changes in Composer

Conflicts:
	src/Symfony/Component/Console/Application.php
	src/Symfony/Component/Console/Command/Command.php
	src/Symfony/Component/Console/Input/InputDefinition.php
	src/Symfony/Component/CssSelector/Node/CombinedSelectorNode.php
	src/Symfony/Component/Form/Form.php
	src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php
	src/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php
	src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterListenersPassTest.php
	src/Symfony/Component/Locale/Locale.php
	src/Symfony/Component/Locale/README.md
	src/Symfony/Component/Locale/Stub/DateFormat/FullTransformer.php
Merge branch '2.3'

* 2.3:
  fixed phpdoc
  Fix some annotates
  [FrameworkBundle] made sure that the debug event dispatcher is used everywhere
  [HttpKernel] remove unneeded strtoupper
  updated the composer install command to reflect changes in Composer

Conflicts:
	src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
updated version to 2.5
fixed @expectedException class names
Merge branch '2.2' into 2.3

* 2.2:
  fixed some typos
  fixed @expectedException class names

Conflicts:
	src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
	src/Symfony/Component/Console/Tests/Command/CommandTest.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
	src/Symfony/Component/Locale/Tests/Stub/StubNumberFormatterTest.php
Merge branch '2.3' into 2.4

* 2.3:
  Fixed mistake in upgrade docu
  Container::camelize also takes backslashes into consideration
  fixed typos
  fixed @expectedException class names
  fixed some typos
  fixed @expectedException class names
  Typo and better wording for german validator translation
Merge branch '2.4'

* 2.4:
  [HttpKernel] fixed regression introduced in 2.4 in the base DataCollector class. Added more unit tests coverage for the RequestDataCollector object.
  Fixed mistake in upgrade docu
  bumped Symfony version to 2.4.0
  updated VERSION for 2.4.0-RC1
  updated CHANGELOG for 2.4.0-RC1
  Container::camelize also takes backslashes into consideration
  fixed typos
  fixed @expectedException class names
  Fix an issue when overriding Client::setServerParameters() and using the getContainer() method in it.
  fixed some typos
  fixed @expectedException class names
  Typo and better wording for german validator translation
Merge remote-tracking branch 'symfony/master' into develop

Conflicts:
	CHANGELOG.md
	README.md
	Tests/ClassMapGeneratorTest.php
	composer.json
	src/test/php/ehough/pulsar/DebugClassLoaderTest.php