Changes in version 0.5.1                        

  - Fixed fapply() and fmap() progress reporting so sequential,
    multicore, and cluster-backed execution advance on completed tasks
    rather than internal chunk boundaries.
  - Improved progress-bar output stability when user code emits messages
    during tracked execution.
  - Added progress-system regression tests covering sequential timing,
    exact parallel counts, and error propagation in cluster and
    multicore execution.
  - Updated package documentation to describe completion-driven progress
    semantics.