[TASK] Respect global settings for timestamps in asset filenames
Merge pull request #419 from bjo3rnf/modificationtime

[TASK] Respect global settings for timestamps in asset filenames
[FEATURE] Add PDF thumbnail viewhelper
[TASK] Add "pdf" prefix to generated PDF thumbnails

This adds a dead-simple pdf prefix to the generated filename.
That way, one is able to simply delete all vhs-pdf-* files
from typo3temp without much hassle after fiddeling with ImageMagick
[TASK] Add the ability to modify the class of the current language

A sensible default was provided to not break older versions.
Merge pull request #422 from cedricziel/allowOverridingOfCurrentClass

[TASK] Add the ability to modify the class of the current language
[BUGFIX] Languages argument can be left empty

In that case, the v:page.language ViewHelper will simply return the current languages uid.
Merge pull request #423 from cedricziel/noLangArg

[BUGFIX] Languages argument can be left empty
[BUGFIX] Correct order of included assets
Merge pull request #420 from bjo3rnf/assetorderfix

[BUGFIX] Correct order of included assets
Merge pull request #418 from bjo3rnf/pdfthumb

[FEATURE] Add PDF thumbnail viewhelper
[BUGFIX] LinkViewHelper should respect tag-content in translations

This fix postpones the title setting for sys_language_uid to the latest possible
point to overcome a bug.
Otherwise, the tag content wouldn't be taken into account when sys_language_uid != 0
Merge pull request #431 from cedricziel/pageLinkFix

[BUGFIX] LinkViewHelper should respect tag-content in translations
[FEATURE] Rootline view helper
Merge pull request #432 from hmspl/rootline

[FEATURE] Rootline view helper