simmer 3.5.1

New features:

• New renege_if() activity triggers reneging upon reception of a signal broadcasted with send() (#84).
• Add support for uninterruptible handlers in trap() (bb2aa46).
• Add support for global attributes in set_attribute() (#82).

Minor changes and fixes:

• Fix bug in set_queue_size() with queue_size_strict=TRUE: arrivals were not being dropped (#83).
• Fix bug in set_capacity() with a preemptive resource when the old value was Inf: arrivals were not being preempted (63beb2c).
• Fix bug in per-resource activity monitoring: activity was not being reset (55097c9).
• Fix trap() printed information.
• Update "Advanced Trajectory Usage" vignette.
• New "Other SimPy Examples" vignette.