Refactoring packge org.warcbase.demo; added Jwat prefix to Hadoop InputFormats class names.
Refactoring: created ArcRecordUtils.
Removed outdated code; cleaned up WarcBrowserServlet.
Fixed issues #75, #73, #67

Issue #75: HTablePool deprecated
Issue #73: Reorganizing package structure
Issue #67: Cleanup WarcBrowserServlet