adding utils function to calc dps
'nauts data is now in json files on the server
because of google spreadsheet api bug http://code.google.com/a/google.com/p/apps-api-issues/issues/detail?id=3411
sometimes direct access to spreadsheet is forbidden
now data is stored on my server and updated once in a while
and nautsbuilder get the server data instead of direct google one
bump to .8.4