work in progress: allow the service to disable content body recognition and clipping derivation.
Make service use the latest DocumentCache and PersistentDocumentCache from BSCore. Minor fixes.
Cache empty task assignment message so that we don't waste time and space on serializing it again and again.
Minor fixes to ServicePerfLogAnalyzer
Merged with latest.
Greatly simplified service logic. Added RedirectHttpClient to handle redirections correctly.
Fixed minor bug with regarding to reload. Updated simplCore to address deserialization error with wikipedia pages.
updated lib jars. small fixes to service helper.
Major cleaning to MetadataServiceHelper.
Various fixes and improvements according to discovered service problems.