Fixed two errors in the d-Bus API.txt doc

- 'item' was missing as a value for the Type parameters.
- The document incorrectly stated that dLeyna-server does not support
  the container ChildCount property.  It's ItemCount we do not support.

Signed-off-by: Mark Ryan <mark.d.ryan@intel.com>
[Copyright] Fix copyright headers

Signed-off-by: Ludovic Ferrandis <ludovic.ferrandis@intel.com>
[Doc] add with-ua-prefix doc to README

Add missing with-ua-prefix option doc to the README.
Fix issue https://github.com/01org/dleyna-server/issues/37

Signed-off-by: Christophe Guiraud <christophe.guiraud@intel.com>
[API] Add new GetMetaData Media Object API

- Add a new method GetMetaData to the org.gnome.UPnP.MediaObject2 interface to allow
the retrieval of the Meta data information of an object in DIDL-Lite XML format.
- MediaConsole python test app updated.
- Doc updated.
- Fix issue https://github.com/01org/dleyna-server/issues/25

Signed-off-by: Christophe Guiraud <christophe.guiraud@intel.com>
[Tests] Add print_metadata() method to MediaConsole

- Add a print_metadata() debug method to the MediaConsole Python
test application. This new method allows to retrieve and pretty
print Media objects Metadata information which are formatted in
DIDL Lite XML.

- Related to issue #25

Signed-off-by: Christophe Guiraud <christophe.guiraud@intel.com>