Removed several unneeded "features" and repository noise

Transporter is rather feature rich, however, it contains support for too
many deprecated and unsupported plugins. Furthermore, things are packed
into the repository that should not be.

Removed:
  - Ant config/support     (mavenized)
  - API documentation      (unneeded)
  - Client patcher         (unneeded)
  - Inquisitor support     (unneeded)
  - NetBeans configuration (unneeded)
  - Permissions support    (deprecated)
  - Register support       (deprecated)
  - Update notifier        (unneeded)

This is a "fat" commit to make merging and rebasing easier.
Use NMS/OBC via reflection for portability