fixed CS
Fixed two bugs in HttpCache

1. 304 responses always send "Content-Type: text/html; charset=UTF-8"
header
I discovered that the HttpCache::handle method calls Response::prepare
after calling Response::isModified.  Response::isModified removes the
Content-Type header as it should, but Response::handle adds in the
default Content-Type header when none is set.  If the default
Content-Type is not the correct Content-Type, then the Content-Type in
the cache gets clobered.  I solved this problem by moving the
Response::isModified call after the Response::prepare call.  I updated
the testRespondsWith304WhenIfModifiedSinceMatchesLastModified and
testRespondsWith304WhenIfNoneMatchMatchesETag tests to verify that the
Content-Type header was not being sent for 304 responses.

2. Failure to invalidate cached entities referred to by the Location
header
I discovered that the Store::invalidate method was looking for Location
and Content-Location headers to invalidate, but it was looking in the
request headers instead of the response headers.  Because the
Store::invalidate method doesn't take a response, I decided it was
better to move this logic to the HttpCache::invalidate method instead.
I updated the testInvalidatesCachedResponsesOnPost test to verify that
Location headers are getting invalidated correctly.
Fix several instances of doubled words

One in an exception; the rest in docblocks.
Merge branch '2.1' into 2.2

* 2.1:
  Fix several instances of doubled words
  [Finder] Fix iteration fails with non-rewindable streams
  [Finder] Fix unexpected duplicate sub path related AppendIterator issue
  Added type of return value in VoterInterface.
  Fixed two bugs in HttpCache

Conflicts:
	src/Symfony/Component/Finder/Tests/FinderTest.php
Merge branch '2.2' into 2.3

* 2.2:
  Fix several instances of doubled words
  [Finder] Fix iteration fails with non-rewindable streams
  [Finder] Fix unexpected duplicate sub path related AppendIterator issue
  Added type of return value in VoterInterface.
  Fixed two bugs in HttpCache

Conflicts:
	src/Symfony/Component/Finder/Iterator/RecursiveDirectoryIterator.php
Merge branch '2.3'

* 2.3: (37 commits)
  [Console] renamed ConsoleForExceptionEvent into ConsoleExceptionEvent
  Fix several instances of doubled words
  [Security] Fixed the check if an interface exists.
  Added missing slovak translations
  [FrameworkBundle] removed HttpFoundation classes from HttpKernel cache
  [Finder] Fix iteration fails with non-rewindable streams
  [Finder] Fix unexpected duplicate sub path related AppendIterator issue
  [Security] Added tests for the DefaultLogoutSuccessHandler.
  [Security] Added tests for the DefaultAuthenticationSuccessHandler.
  [ClassLoader] tiny refactoring
  [Security] Added tests for the DefaultAuthenticationFailureHandler.
  [Security] Added tests for the remember me ReponseListener.
  [Security] Added tests for the SessionAuthenticationStrategy.
  [Security] Added tests for the AccessMap.
  [FrameworkBundle] removed deprecated method from cache:clear command
  [WebProfiler] remove deprecated verbose option
  fix logger in regards to DebugLoggerInterface
  [Form] [2.3] removed old option
  Added type of return value in VoterInterface.
  [Console] Add namespace support back in to list command
  ...