Fixes the following issues:

* https://github.com/TYPO3Fluid/Fluid/pull/76
  BUG Possibly NULL value in SpacelessViewHelper
* https://github.com/TYPO3Fluid/Fluid/pull/80
  PERFORMANCE Internal cache of resolved ViewHelpers
* https://github.com/TYPO3Fluid/Fluid/pull/82
  BUG Key used in ForViewHelper defaults to NULL
* https://github.com/TYPO3Fluid/Fluid/pull/84
  BUG Improper array accessing
* https://github.com/TYPO3Fluid/Fluid/pull/85
  BUG/TASK Prefix to avoid reserving "sections" variable name
* https://github.com/TYPO3Fluid/Fluid/pull/72
  BUG Windows paths support in TemplatePaths
* https://github.com/TYPO3Fluid/Fluid/pull/87
  BUG Avoid invalid class name in compiled code when using non-file template sources
* https://github.com/TYPO3Fluid/Fluid/pull/77
  BUG Recursive section rendering accesses incorrect RenderingContext
  (see https://forge.typo3.org/issues/74393)
* https://github.com/TYPO3Fluid/Fluid/pull/94
  BUG Avoid double HTML encoding on chained view helpers
  (see https://forge.typo3.org/issues/75133)

Change-Id: I30062eb4a7fee1c2745a8067764f18d0753db88e
Releases: master
Resolves: #75135
Resolves: #74393
Reviewed-on: https://review.typo3.org/47279


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>