processwiki: More comments, handle Russian Координаты param
TwitterDoc: Add lang, location, timezone, utc_offset
MergeMetadataAndOldCounts: Fix edge case involving U+2028 in words (FIXME should be treated as whitespace in processwiki.py)
MergeMetadataAndOldCounts: Don't output 'Handling ...' for every article to reduce output pollution
preprocess-dump: Fix bug reprocessing an existing permuted dump