Feature request: add cycle number to output when fitting model

CURRENT:


[00h 00m 11s] [INFO] Objective function = 5633.2080
[00h 00m 12s] [INFO] Objective function = 5534.2210


DESIRED:

[00h 00m 11s] [INFO] Cycle 10 Objective function = 5633.2080
[00h 00m 12s] [INFO] Cycle 11 Objective function = 5534.2210