Use JSR-330 annotations
Try to complain when "magic" @ExtensionPoint or @Manage support kicks in.  Still has some issues.
Improve legacy warning muck, leave plexus bitching as debug for now.
Add debug logging of the source of the classes and ignore issue with null clazz
visitAnnotation() is called multipule times on the same class
Fix a few more JSR-330 component issues
Complain (atm at DEBUG) if we fine @ExtensionPoint or @Managed components
normalize log messages
Use FQCN for log messages.  Add warn/debug helpers.  Add warn for legacy @Singleton and @Named.
Merge pull request #723 from sonatype/warn-when-magic-annotations-kick-in

Warn when magic annotations (@ExtensionPoint @Managed) kick in
Merge remote-tracking branch 'origin/master' into nexus-5472-proxy404