io: Don't do unbuffered input stream; slows down bzip2 decompression by 100x
FilterGeotaggedWiki: Add progress meter
runexps.sh: Add date to Wikipedia log file
Remove util/argparser.scala, modified Argot and things that depend on it (hadoop.scala,experiment.scala) to avoid clashes with unmodified Argot
LogUtil: Make it able to handle old as well as new TextGrounder logfile format
runexps.sh: Updates to TextGrounder log name format