Restored some sanity to versions and transitive dependencies.
Refactoring UrlUtil and related classes.
Bump max value size up to 10 MB, tweak WAL settings.
Better handling of ARC parse errors.
Fixed issues #71, #70, #66, #63 and #62 (partially)

Issue #71: Cleanup UrlUtil/Util
Issue #70: Clean up pom.xml
Issue #66: Build issue with overlapping fastutil versions
Issue #63: Ingestion bug: OOM error
Issue #62: Ingestion bug in copyStream, wrong number of bytes expected