Update Analytics Box

Move to Statistics (covered by update script)
Add Plugins to support opt-out mechanism
Use BaseProperties (no seperate domain analytics component necessary)
Delete Helper StatisticCode

Should be handled by boxes now
Instead of backward compatibility an exception is thrown when analytics code is set in config
but Analytics Box is missing
Move Adsense component to Kwc/Statistics
Rename config settings for statistics
Update class name
Piwik send disableCookie when opt out