Log Message:
Update to 0.4:

The 0.4 release includes several improvements and bug fixes:

      * Added support for specifying paths to exclude from the add-in
        scan in .addins files [1] and in add-in manifests [2].
      * There are several new flags [3] which can be applied to
        add-ins:
              * Can't uninstall: the add-in can't be uninstalled.
              * Can't disable: the add-in can't be disabled.
              * Hidden: the add-in won't be visible in the setup tools.
      * Fixes in the add-in scanner.
              * The new (and optional) Mono.Addins.CecilReflector
                assembly provides a Cecil-based backend for the add-in
                scanner. This scanner is more reliable than the
                reflection based scanner.
              * When updating the registry, the add-in scanner will only
                update add-ins belonging to the running application
                (ignoring directories from other instances of the same
                or different applications sharing the same registry).
      * Fixed issue with path length limitation in Windows.
      * Other bug fixes and API improvements.