FIX: Wrong arguments for doFirstVisit and doLastVisit in TreeWalker
FIX: tests
FIX: test NestedSetVisitorTest
FIX: removeSessionDataByNamespace now saves result to the object variable
Merge branch 'develop' of gitlab.pluspunkthosting.de:pt/pt_extbase into develop

* 'develop' of gitlab.pluspunkthosting.de:pt/pt_extbase:
  FIX: test NestedSetVisitorTest
  FIX: tests
  FIX: Wrong arguments for doFirstVisit and doLastVisit in TreeWalker
  FIX: UrlEncodeViewHelper
  FIX: php warning
  CHG: raise TYPO3 version dependency to 6.1.99
  TASK: revert last commit
  FIX: index boundaries
  FIX: Fixed FlashMessages ViewHelper to be compatible with older Extbase versions
  CHG: findPagesInPid now orders the result by sorting field
  ADD: Interface singleton to FeBeModeDetector
FIX: test directory of HashFileSystemServiceTest
FIX: HashFileSystemServiceTest
FIX: HashFileSystemServiceTest