installer: check for existing status, add startSetup() and endSetup(), remove declaration of unused table
Merge pull request #11 from liip-forks/fix-status-installer

installer: check for existing status, add startSetup() and endSetup(), r...
wrong dependency, Mage_Sales is required for status installer
Merge pull request #12 from liip-forks/fix-status-installer

wrong dependency, Mage_Sales is required for status installer