fix. live_account_query, refs to log_user rather than ept_user.  Remove join to page table.
mod. allow format_namespace to handle variable namespace columns.
mod. format_namespace, allow namespace to simply be an int.
mod. only apply substitution in sub_tokens for non-empty strings.
add. get_latest_user_activity to retrieve a users latest stamp to the rev table.
fix. Only apply -1 result to users that have not been alive for t minutes and not clicked the edit button.
mod. rename 'interval' parameter to 'slice'.  This parameter defines the size of time series request slices.
mod.  rename aggregators + fix condition on qualifying a time series request.
mod. redefine UserMetricPeriod classes.  There are only two types REGISTRATION & INPUT.  Default is REGISTRATION.  In the URL INPUT is specified now by "activity".
mod. Change default start & end timestamps in UserMetric class.
Merge pull request #23 from rfaulkner/working

Rework some query Params & job queue logic