* implemented task for sending IndexerCommands to shared memory on demand
* SourceGroups now return IndexerCommandProviders instead of just a list of indexer commands. This way information can be stored in a compressed format
* merged IndexerCommandCxxEmpty and IndexerCommandCxxCdb
* moved sorting of indexer commands by file size from IndexerCommandList to TaskFillIndexerCommandQueue
* removed obsolete IndexerCommandList class
* wait for IndexerCommandQueue to be filled before starting the indexers
* restart finished indexer processes while indexerCommandQueue is still running
* restart indexer threads as long as there are indexer commands to process
* removed Blackboard::getMutex() and added an atomic update() method
mlangkabel
9998855527