remove dead code in yaml component
Merge branch '2.1' into 2.2

* 2.1:
  [FrameworkBundle] Fixes invalid serialized objects in cache
  remove dead code in yaml component
  fixed typo
  RedisProfilerStorage wrong db-number/index-number selected
  [DependencyInjection] added a test for the previous merge (refs #7261)
  Unset loading[$id] in ContainerBuilder on exception
  [Console] fixed StringInput binding
  [Console] added string input test
  Revert "merged branch jfsimon/issue-6749 (PR #7220)"
  fixed CS

Conflicts:
	src/Symfony/Component/Console/Tests/Input/StringInputTest.php
	src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php
Added unit tests to Dumper
[Yaml] fixed bugs with folded scalar parsing
Merge branch '2.1' into 2.2

* 2.1:
  #7106 - fix for ZTS builds
  Added '@@' escaping strategy for YamlFileLoader and YamlDumper
  [Yaml] fixed bugs with folded scalar parsing
  [Form] made DefaultCsrfProvider using session_status() when available
  Added unit tests to Dumper
  Update .travis.yml (closes #7355)
  [HttpFoudantion] fixed Request::getPreferredLanguage()
  Revert "merged branch jfsimon/issue-6928 (PR #7378)"
  Routing issue with installation in a sub-directory ref: https://github.com/symfony/symfony/issues/7129

Conflicts:
	.travis.yml
	src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
	src/Symfony/Component/Routing/RouteCollection.php
[Yaml] fixed handling an empty value
[Yaml] improved boolean naming ($notEOF -> !$EOF)
Merge branch '2.1' into 2.2
start and end marker fixes
updated composer meta data
fixed marker bug
removed test failer
dumpertest fix: newline neutralization
folder renamed for tests
moved source files
removed composer trailing comma
travis yaml configuration
script fixed
no intention of maintaining a "changelog". Read the git commits.
updated readme for installation