Merge pull request #96 from nsendetzky/master

Implements stock level handling in new catalog stock plugin
Merge pull request #97 from nsendetzky/master

Updates to latest Arcavias core
Merge pull request #98 from nsendetzky/master

Adds TypoScript configuration field for Arcavias scheduler task
Updates version to 0.8.0
Updates to latest Arcvias core and includes new Arcavias zend extension