Reduce amount of compulsory option parameters

[Desrever Nu]

"nudport" and the "rpcpass" and "rpcuser" and nubitaddress , and mailrecipient should be accessed

[Desrever Nu]

And for ccex, also make the api-key parameter optional

[Desrever Nu]

and "price-distance-threshold":10 can be made default

[Desrever Nu]

on feature/70 made conditionally optional subparameters .