added country id to topojson and changed the return value of the js to be the country id. this is to simplify the identifier used by Redis
removing commented out code.
buffering of stream content prior to processing as chunked responses may not always break on a tweet boundary.
added redis bitsets for each item to be analysed. this needs to be tidied up. capitalised mood states for consistency in the Redis keys.
removing the lua script which is now embedded within code