minor improvements

[maboiteaspam]

Add an example file example.js which demonstrates more about the library
Changed Bonjour.findOne method to add opts.timeout support

[maboiteaspam]

Hi!
I have also added some debug message support at https://github.com/maboiteaspam/bonjour/tree/patch-1 (bonjour --verbose multicast-dns,bonjour)
but not compatible with node 0.10, so yeah did not want to pollute your prs.

edit: awesome lib !

[watson]

Hi @maboiteaspam

Thanks a lot for the pull request 😃 In the future it would have been better if you'd split this up into two separate PR's as the two commits have nothing to do with each other. That would make each easier to discuss.

[watson]

I think it would make more sense to just call the callback without any arguments instead of false in case the timeout happens

[watson]

@maboiteaspam ping 😃