Slow down tests so they pass on my older computer
Add test to verify shutdown issue

When I run a bunch of tasks, and one has an exception, I expect the
other tasks to fail. However, they keep running! This test verifies
that.
Fix unchunk lazy-seq ordering bug.
Fix pmap exception stopping bug

This fixes the issue where pmap would keep running tasks even after one
threw an exception.
Version bump
Merge pull request #5 from TheClimateCorporation/stop-tidy

Stop tasks when one throws an exception