Gradle is forcing a move away from using 'project' during task excution
and because of some interactions there, this is easiest by making them
real classes. That makes them start looking quite strange in the build
file, so they are now moved to buildSrc/. We could have continued using
Groovy, but it is weird in some ways that are more apparent when making
classes and not just scripting. Instead, they were converted to Java.
They are compatible with delayed configuration resolution as well.
Eric Anderson