progressBar.Progress() and progressBar.Task() return int value.
Add an example.
Paste example.go to README.md.
Shorten the example.
Fix: Remove a needless closing bracket.
Cosme: Use tab-indentation by fixing golang's way.
Update progressbar with channel.
Remove a needless property.
Make "IsShown" public.
Merge branch 'feature/channel-update'