fix lint

Merge pull request #2 from nextzhou/feature/en_readme

fix README typo

add Options.SkipPendingTask(),Used instead of DontSkipTask() and Igno…

…reSkippingPendingErr()

add Options.DontSkipTask()

add Wraps.RunStopTask()

phased task

go single Task without Workpool

use unsafe.Pointer atomic operations instead of atomic.Value to impro…

…ve go versions compatibility

Create LICENSE