Added new trait ConfigureAware and support it in Plugin handling.
Renamed and documented PluginConfigureAware trait.
Merge branch 'master' into plugin-configure-hooks

Edited the following files to resolve the non-trivial conflicts:
	de.tototec.sbuild/src/main/scala/de/tototec/sbuild/Plugin.scala
	de.tototec.sbuild/src/main/scala/de/tototec/sbuild/internal/PluginAwareImpl.scala
Fixed missing return in closures.
Disabled log messages of I18n.
Improved logging and a fix of the initialization logic.