Fix references to http://macroid.github.io

[stanch]

I have removed the old organization and the old site (I think github still has it in cache) to avoid confusion with the new one. Could you replace the references to http://macroid.github.io with 47deg.github.io/macroid? For example:

• [x] https://github.com/47deg/macroid/blob/master/build.sbt#L76
• [x] https://github.com/47deg/macroid/blob/master/build.sbt#L84

Not sure if there are others.