Tutorial FS_JSON

Scenario:

FreeSWITCH with vanilla configuration, replacing mod_cdr_csv with mod_json_cdr.
Modified following users (with configs in etc/freeswitch/directory/default): 1001-prepaid, 1002-postpaid, 1003-pseudoprepaid, 1004-rated.
Have added inside default dialplan CGR own extensions just before routing towards users (etc/freeswitch/dialplan/default.xml).
FreeSWITCH configured to generate default http-json CDRs.
CGRateS with following components:
CGR-SM started as prepaid controller, with debits taking place at 5s intervals.
CGR-Mediator compoenent attaching costs to the raw CDRs from FreeSWITCH_ inside CGR StorDB.
CGR-CDRE exporting mediated CDRs from CGR StorDB (export path: /tmp).
CGR-History component keeping the archive of the rates modifications (path browsable with git client at /tmp/cgr_history).