[TwigBridge] fixed the translator extractor that were not trimming the text in trans tags (closes #7056)

Trimming was not done by the extractor but it was the default behavior
of the TransNode class. Now, things are consistent between the two.
[TwigBridge] fixed trans twig extractor
Merge branch '2.1' into 2.2

* 2.1:
  Options small typo
  [Console] fixed unparsed StringInput tokens
  [TwigBridge] fixed trans twig extractor
  [DomCrawler] fix handling of schemes by Link::getUri()
  [Console] Fixed comment
  [TwigBridge] fixed the translator extractor that were not trimming the text in trans tags (closes #7056)
  Fixed handling absent href attribute in base tag
  added a DebuClassLoader::findFile() method to make the wrapping less invasive
  fixed CHANGELOG
  bumped Symfony version to 2.1.9-DEV
  updated VERSION for 2.1.8
  updated CHANGELOG for 2.1.8
  StringInput resets the given options.

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php