KAZOO-2142: working with stepswitch and cf_receive_fax to allow for t38 parameters to be set based on carrier settings
KAZOO-2142: adding functions to stepswitch resources to allow for carrier gateway settings
KAZOO-2142: removing lager:debug statement
KAZOO-2142: Inbound fax plus t38 option on callflow, carrier, or fax config
KAZOO-2142: emacs goof that wrapped the fax property in a list
KAZOO-2142: Fixes from Pull request review
KAZOO-2142: adding execute_on_answer to special channel vars in ecallmgr.hrl to allow for t38_gateway self/peer to work corectly
KAZOO-2142: Ditch that whitespace
Merge pull request #255 from 2600hz/KAZOO-2142

Kazoo 2142