* spl-token: WIP
* Remove and_then, move tx handling in separate function- output handling still missing
* spl-token: add basic output handling for all calls, add detailed output to create-token
* spl-token: remove changes in bench that are not strictly necessary to remove # of files touched in this PR
* [spl-token] cli: HandleTxReturn is now TransactionReturnData
* [spl-token] cli: Make commands return output String that is printed in fn main()
* [spl-token] cli: remove old todos
* [spl-token] cli: only use no_wait arg in command_transfer and use constant for "create-token"