[go-nuts] [ANN] pool - a generic worker pool

At the end of "A Tour of Go" there's a web scraping exercise<http://tour.golang.org/#70>and in trying to parallelize the URL fetching I felt the need to limit the
number of concurrent requests (think about the kind of load we may be
generating for a server if we'd be scraping real sites). My solution to
this was a generic worker pool: https://github.com/stefantalpalaru/pool(licensed under MPL-2).

The simplified example<https://github.com/stefantalpalaru/pool/blob/master/examples/pool_example.go>shows two usage patterns: the classic "add all the jobs and wait until
they're all done" you get with multiprocessing.Pool in Python and a more
flexible "add the jobs whenever you want and get the results whenever
they're available". The latter is used for web_crawler.go<https://github.com/stefantalpalaru/pool/blob/master/examples/web_crawler.go>.