added logging to Graphite of counts many regions; I may remove in a sec because local client is a bit flaky
only log overall total
playing with surprisingness i.e. the ratio between expected number of occurrences based on overall occurences, and the actual number of occurrences
added impl of ordering ngrams by TFIDF score, where document = geohash region, term = ngram, and frequency = tweets for ngram in region
added some embedded urls