Simplified Maven dependencies; Moved from IA artifacts to openwayback artifacts.
openwayback-core pulls in hadoop-core; excludes
Tried disabling WAL to see impact on performance.
Ignores all files that aren't WARC/ARC files in ingest.
Added try/catch block in ingestion code.
Added log4j properties.
Merge branch 'jar_upgrade' into disable_wal
Merge branch 'master' into disable_wal

Conflicts:
	src/main/java/org/warcbase/data/ExtractLinks.java
Merge branch 'disable_wal' of github.com:lintool/warcbase into disable_wal
Merge branch 'jar_upgrade' into disable_wal
Reformatting source.
Fixed Issues #5 and #6