When using your default build.gradle without a mavenUrl I get an error thrown by gradle and it can't continue. The only fix I've been able to do is add mavenUrl = null in the file. Unfortunately this is deprecated on gradle and as of 2.0 it will be removed. It's patchwork but I can get by with this. I apologize if there's an easier way to fix this issue, noob at gradle here.

Another option is to just remove the entirety of the maven upload portion but there has to be a better way as to not have two different gradle files (public and private)

I'll try to fix the gradle.build for the next update.