Register for OS file system changes instead of scanning

The scanning process seems to be rather resource intensive and slow, I know some other DLNA servers use libevent in linux to monitor for changes in the file system and in windows there is a similar API System.IO.FileSystemWatcher. This should greatly reduce system resources and disk access, requiring only a full scan on launch to find out what has changed with the app was offline.

[zip]

this will come when we move to Java 7

[Cerberus]

Sorry just to make what zip has just said abit clearer JAVA 7 is supported at teh current time but to allow this feature we would have to move completely over to JAVA 7 and no longer support java 6 and that is not an option as java 7 is still at beta stages and not availibel on all patforms/operating systems. Hope that make it abit clearer for the less techie amoung us