Windows compatibility

[Vamoss]

Hi all,

I was able to make it work on Windows with of0.12.

These are the lib updates required:
https://gist.github.com/Vamoss/a7f769845cd47c4c7ea076f68617ffb5

On the ofxEtherdream.cpp, you gonna need to update:
usleep(1000000);

To:
ofSleepMillis(1000);

And update the init() to return no value, because it is a void function, and it cant return nothing.

I didnt tested if it still works on Mac, but I think it kept the requirements to work in both.

Cheers,
Vamoss