change to store counts against geohash
use @redis.incr directly
store geohash counts as sortedsets
add saving of ngrams (length 2) against geohash; not yet surfacing this data anywhere
also index ngram tweet counts
reduce precision to 3, should give a saving in number of keys of about 32^3
pull out classes to modules
removed .js suffix during require
add tests for LatLon
add missing geohash lib
add test for TweetTokenizer
add npm test command based on vows
make precision quite low, i.e. 2
put largest counts at top by default