add v3 to package name for go module compatibility (#20)

change the way workers cleanup and pool dispatcher closes out to avoi…

…d odd waitgroup race condition. add benchmark makefile target (#19)

wrap errors so that caller's can unwrap the error (#15)

* use uber's multierr so that caller's can unwrap the error

* don't use uber's multierr

* added test case where there is no error

update target go version in travis

update target go version in travis

V3.1.2 (#12)

* Revert "eliminate data races (#11)"

This reverts commit 66c4a73.

* cleanup after yourselves

eliminate data races (#11)

Add CancelableParallel (#9)

* Add CancelableParallel.

CancelableParallel is similar to Parallel, except it passes a
context.Context to the worker functions, and cancels the context as soon
as a worker function returns with an error.

* Use a timer in the test so it finishes faster

Merge pull request #6 from bigodines/unify-errors

Unify errors

Merge pull request #4 from brandoneprice31/fix

fixed package naming