Easy way of processing the data using a function pointer

[dcalogue]

This way we can supply the library with a function pointer where we will process the data received.
This should allow anyone to use the library without modifiyng it on a per project basis.

[jersey99]

Thanks for the PR. The change looks good! I will test it sometime this week, and if it works I will merge it.

[jhlink]

This seems so crazy stupid simple...
I'll check with @jersey99 as well.

[jersey99]

@jhlink What do you mean by "this seems so crazy stupid simple .."? And what do you mean by you will check with me?

[jhlink]

Haha, sorry @jersey99 for the miscommunication. :)

Using function pointers has never crossed my mind. This is something I've come across frequently in node, but I've never really seen it used in C++ or considered using in C++.

Instead of using "checking," I should have used "trying." I've got some extra Photons lying around, and was going to try out this PR on them. Super excited to see how function pointers will work in this library!

[rlogiacco]

this PR has been left pending for more than 2 years...