* Added new OperationErrorHandle class to handle errors in OperationManager::run().
* Renamed OperationErrorHandler::errorOccurred() into operationErrorOccurred().
* Added NodeOperationManager::setNodeErrorHandler().
* Added NodeOperationManager into LocalNode class.
* Fixed error cases.
* Implemented LocalNodeOptimizeOperation class.
* Added TabletStorage::lock() and unlock().
* Fixed TabletSQLite methods not to use static sqlite3_stmt variables.
* Fixed TabletSQLite methods to run multi thread mode.
* Changed LocalNode::nodeAdded() to use NodeOperationQueue to optimize the local records.
Merge branch 'master' of https://github.com/cybergarage/Fractal