fixed a bug regarding determining the fileinfos and created two generic functions for filesystem stuff, where windows part can be implemented
added code to delete external media items from database, if LOW_RESOURCE_MODE has been enabled
added code to delete not any more configured external media items from database
added some checks for the DatabaseName configuration option
added TempDir conifguration parameter to configuration file and updated default pdlna.conf
added sanity check when streaming external scripts