Support running on OSX

[DukeyToo]

OSX bash shell doesn't have a timeout command, but often (at least dev OSX machines) will have perl. Can do:

function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }

[thomaschaaf]

To get the script to run execute the following commands:

brew install coreutils
alias timeout=gtimeout

And you should be good to go.

(from http://stackoverflow.com/questions/3504945/timeout-command-on-mac-os-x)

[DukeyToo]

I do like the gtimeout approach - not as a prerequisite, but I could easily change PR #17 to use that instead where it is available.

[maxcnunes]

If you are looking for an approach that does not depend on third party tools (curl, wget) and has cross platform support. Please take a look on this other tool https://github.com/maxcnunes/waitforit.