justin ryan <> in Gradle

Fix JUnit reference

GRADLE-2313 Lazily get temporary directory, calling back to AbstractTask.getTemporaryDir() which will call mkdirs() to ensure the directory exists when it is being asked for.

Adding additional Findbugs attributes: include, exclude, visitors, omitVisitors, effort, reportLevel

Documentation changes on Project to reflect ext namespace

GRADLE-2163 Added additional getter to boolean types