registration status: use the new method

The fields are less than usual. This needs to be replaced with longer term in-memory DB (redis?) for `save(location)`.
Update changelog for 0.0.44 release
corrected field names
Update changelog for 0.0.45 release
HTML 5!
Update changelog for 0.0.46 release
registration status: actually OpenSIPS' code provides more.

~opensips/modules/usrloc/ul_mi.c has the list :)
Update changelog for 0.0.47 release
stats: proper this.
Update changelog for 0.0.48 release
stats: oops, no account there, let's use `profile`
Update changelog for 0.0.49 release
stats: added "stale=update_after" to speed-up rendering (at the cost of latest data)
Update changelog for 0.0.50 release
bDestroy removes all tables?
Update changelog for 0.0.51 release
stats: work around DataTable binding data to the DOM (?)
Update changelog for 0.0.52 release
stats: order of updates
Update changelog for 0.0.53 release