Fixed bugs

• Avoid circular dependencies with other plugins by manually plumbing the test dependency on main instead of using the compile classpath (#631). Fixes #624, a regression introduced in 0.9.0
• Emulate and deprecate generatedFilesBaseDir (#636). generatedFilesBaseDir no longer changes the output directory directly. Instead, the default directory is always used and files are copied to generatedFilesBaseDir. This allows the task to delete previous output before generating new output. Users of generatedFilesBaseDir should stop using the configuration and instead use a separate Copy or Sync task. Fixes #33 where generated code of old builds remains, for users not using generatedFilesBaseDir
• Set default command length limit to 64k (#653). Fixes argument list too long on Mac OS (#633)