Adding cli param to disable usage tracking

[lesaff]

I just noticed that swiff tracks usage. Is there a way to disable this? I understand the need of tracking but not all users would appreciate being tracked.

Thx

[ben-rogerson]

agreed, I'd like to remove it altogether - it was only added to count the number of task calls so I could order them appropriately in the UI. There's no need for it now so next release it's highly likely to be stripped out.