- display Warnings in overview pages if not a gateway is not configured for admin usage
- show gathered stat information in table on new page gatewayStatistics, (Server -> Server Manager -> Spectrum2 Stats)
- helper for better presentation of gathered data in AdminManager (KB to MB, sec to S/M/H/D)
- also display number of registrations to see online/registered ratio
pretty much finished now, just some minor changes before release needed

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13702 b35dd754-fafc-0310-a699-88a17e54d16e