Checks the status of a list of urls

Usage:

$ ./check <url>
$ ./check < url-list.txt
$ ./check <url> -- -k # pass -k to curl command

Runs GET requests against the list of URLs and prints:

• status code
• url
• time to complete request
• time to first byte (time_pretransfer - time_starttransfer)

Note: this was written on a Mac in a hacky fashion (sorry), but also not tested on other *nix systems. If you see a problem, please open a pull request.