fix problem: can't show tweet#(best|timeline|recent) with no params
enable caching for user stats and friendships
update routes
update stats
optimize stats calc: unite #pluck s
fix sql of Tweet#dicovered_of
fix typo...
fix problem: protected user can't show own page
fix problem: protected user can't show own page (2) when OAuth Echo
fix users#stats
HTML escape "&" in bio and name (temp / should be rewritten)
update collector
update collector: add logging when unauthorized