328: useroption for mailings
added db-mutation and translations, updates #328
Revert "updated team member list"

This reverts commit c297bbc6c418b0746f932598a301fa9bd01ca299.
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208: new events
Removed comments from locale JSON. Added error logging (/tmp/ocde.log) to locale parser.
Renamed root namespace to "OpencachingDE".
Fixed file permissions.
Use core.php to load Autoloader and initialise everything.
Added Dependency Injection (DI) method from Symfony framework.
Added ChromePhp logger and some dummy loggers. These signature is somewhat compatible to Monolog which Symfony uses.
Added Config service skeleton - to be used via DI.