add acmqueue Vol17, issue 6 articles

[pschuermann]

Added the acm queue special articles:

• Cognitive Work of Hypothesis Exploration During Anomaly Response
• Managing the Hidden Costs of Coordination
• Beyond the "Fix-it" Treadmill
• Revealing the Critical Role of Human Performance in Software

I think they are all really good and easily consumable.

[lorin]

Thanks for the contribution!