Bug fixes and a random data generator

LoadFileStage - 
	use a RandomAccessFile to force read only mode
	moved some object creation out of the while loop
	added the ability to optionally print put operation times to the log
	Remove unused getters and setters

NetworkBytesMonitor - prevented a NPE when the end of the file is
reached

RandomDataStage - a new stage that will put random data into the cache

Updated XSD file