Merge branch 'release/0.9.0'
Merge branch 'release/0.9.1'
Go back to PSR-4
Fix broken password validation
removed unused functions
detect mode only if  debugger enabled
Removed memcache from auto setup, added memcache server config, removed memcached support
removed memcahed from the list of cache options
Switch to old fashion array declaration in the index.php to allow PHP to parse without failing and then check for the required PHP version (5.4+) [Fixes #36]
disable display_errors in production environment
Merge pull request #43 from rindeal/hotfix/debugger-mode

Some tiny fixes in Debugger
Merge branch 'develop' into feature/vendor_free