fix import path "code.google.com/p/go.net/context" => "golang.org/x/net/context" in examples
Merge pull request #123 from pierrre/master

fix import path "code.google.com/p/go.net/context" => "golang.org/x/net/context" in examples
Moves examples into non-installed location

Thanks for the tip from @pierrre in #123
Fixed a typo in the README.
Merge pull request #126 from bfitzsimmons/patch-1

Fixed a typo in the README.
Adds a regression test for Ack race detection
Accepts half of the Acks then closes

This triggers the channel shutdown while Acks are in flight on
goroutines, exercising the race.
fix #119