1. The Gradle apt plugin is no longer needed to process annotations.
2. Without the apt plugin, Gralde puts the source files generated by
annotation processors in build/generated/sources/annotationProcessor.
3. Change the location of custom generated files to be consistent.
4. Fix a javadoc formatting error.
* Add a "buildFmt" gradle target
This does the same thing as the automatic Java build target, except instead of
failing if the code formatting isn't correct, it just automatically reformats as
necessary and continues on.
* Remove unnecessary mustRunAfters
* Make it run tests too, and add :taskTree task
* Rename task to coreDev and remove run afters
* Add task tree dependency
* Actually that may not be necessary
